| airflow | (noun) the flow of air | Synonyms: air flow, flow of air |
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| backflow | (noun) a flow that returns toward its source | Synonyms: backflowing |
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| backflowing | (noun) a flow that returns toward its source | Synonyms: backflow |
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| bellflower | (noun) any of various plants of the genus Campanula having blue or white bell-shaped flowers | Synonyms: campanula |
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| bobfloat | (noun) a small float usually made of cork; attached to a fishing line | Synonyms: bob, bobber, cork |
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| butterflower | (noun) any of various plants of the genus Ranunculus | Synonyms: butter-flower, buttercup, crowfoot, goldcup, kingcup |
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| candyfloss | (noun) a candy made by spinning sugar that has been boiled to a high temperature | Synonyms: cotton candy, spun sugar |
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| cauliflower | (noun) compact head of white undeveloped flowers | - |
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| (noun) a plant having a large edible head of crowded white flower buds | Synonyms: Brassica oleracea botrytis |
| cheeseflower | (noun) erect or decumbent Old World perennial with axillary clusters of rosy-purple flowers; introduced in United States | Synonyms: cheese, high mallow, Malva sylvestris, tall mallow |
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| chiggerflower | (noun) erect perennial of eastern and southern United States having showy orange flowers | Synonyms: Asclepias tuberosa, butterfly weed, chigger flower, Indian paintbrush, orange milkweed, pleurisy root, tuber root |
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| ciprofloxacin | (noun) an oral antibiotic (trade name Cipro) used against serious bacterial infections of the skin or respiratory tract or urinary tract or bones or joints | Synonyms: Cipro |
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| coneflower | (noun) any of various perennials of the eastern United States having thick rough leaves and long-stalked showy flowers with drooping rays and a conelike center | - |
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| (noun) any of various plants of the genus Rudbeckia cultivated for their large usually yellow daisies with prominent central cones | - |
| (noun) a wildflower of the genus Ratibida | - |
| cornflour | (noun) starch prepared from the grains of corn; used in cooking as a thickener | Synonyms: cornstarch |
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| cornflower | (noun) an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers | Synonyms: bachelor's button, bluebottle, Centaurea cyanus |
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| (noun) plant of southern and southeastern United States grown for its yellow flowers that can be dried | Synonyms: strawflower, Uvularia grandiflora |
| cuckooflower | (noun) a bitter cress of Europe and America | Synonyms: Cardamine pratensis, cuckoo flower, lady's smock, meadow cress |
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| cupflower | (noun) any of various plants of the genus Nierembergia having upturned bell-shaped flowers | Synonyms: nierembergia |
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| (noun) Mexican evergreen climbing plant having large solitary funnel-shaped fragrant yellow flowers with purple-brown ridges in the throat | Synonyms: chalice vine, Solandra guttata, trumpet flower |
| dayflower | (noun) any plant of the family Commelinaceae | Synonyms: spiderwort |
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| defloration | (noun) the act of depriving a woman of her virginity (especially by rupturing the hymen through sexual intercourse) | - |
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| (noun) an act that despoils the innocence or beauty of something | - |
| efflorescence | (noun) a powdery deposit on a surface | Synonyms: bloom |
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| (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, florescence, flowering, inflorescence |
| (noun) any red eruption of the skin | Synonyms: rash, roseola, skin rash |
| (noun) the period of greatest prosperity or productivity | Synonyms: bloom, blossom, flower, flush, heyday, peak, prime |
| exaflop | (noun) (computer science) a unit for measuring the speed of a computer system, equal to one quintillion floating-point operations a second. | Synonyms: EFLOPS |
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| fingerflower | (noun) tall leafy European biennial or perennial having spectacular clusters of large tubular pink-purple flowers; leaves yield drug digitalis and are poisonous to livestock | Synonyms: common foxglove, Digitalis purpurea, fairy bell, finger-flower, finger-root, fingerroot |
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| flameflower | (noun) plant with fleshy roots and erect stems with narrow succulent leaves and one reddish-orange flower in each upper leaf axil; southwestern United States; Indians once cooked the fleshy roots | Synonyms: flame-flower, flame flower, Talinum aurantiacum |
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| (noun) a plant of the genus Kniphofia having long grasslike leaves and tall scapes of red or yellow drooping flowers | Synonyms: flame-flower, flame flower, kniphofia, tritoma |
| flashflood | (noun) a sudden local flood of great volume and short duration | Synonyms: flash flood |
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| float | (noun) an air-filled sac near the spinal column in many fishes that helps maintain buoyancy | Synonyms: air bladder, swim bladder |
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| (noun) something that floats on the surface of water | - |
| (noun) a hand tool with a flat face used for smoothing and finishing the surface of plaster or cement or stucco | Synonyms: plasterer's float |
| (noun) an elaborate display mounted on a platform carried by a truck (or pulled by a truck) in a procession or parade | - |
| (noun) a drink with ice cream floating in it | Synonyms: ice-cream float, ice-cream soda |
| (noun) the number of shares outstanding and available for trading by the public | - |
| (noun) the time interval between the deposit of a check in a bank and its payment | - |
| floatation | (noun) financing a commercial enterprise by bond or stock shares | Synonyms: flotation |
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| (noun) the phenomenon of floating (remaining on the surface of a liquid without sinking) | Synonyms: flotation |
| floater | (noun) an insurance policy covering loss of movable property (e.g. jewelry) regardless of its location | Synonyms: floating policy |
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| (noun) an object that floats or is capable of floating | - |
| (noun) a swimmer who floats in the water | - |
| (noun) a wanderer who has no established residence or visible means of support | Synonyms: clochard, drifter, vagabond, vagrant |
| (noun) a voter who votes illegally at different polling places in the same election | - |
| (noun) an employee who is reassigned from job to job as needed | - |
| (noun) a debt instrument with a variable interest rate tied to some other interest rate (e.g. the rate paid by T-bills) | - |
| (noun) spots before the eyes caused by opaque cell fragments in the vitreous humor and lens | Synonyms: musca volitans, muscae volitantes, spots |
| floating | (noun) the act of someone who floats on the water | Synonyms: natation |
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| floatplane | (noun) a seaplane equipped with pontoons for landing or taking off from water | Synonyms: pontoon plane |
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| floc | (noun) a small loosely aggregated mass of flocculent material suspended in or precipitated from a liquid | Synonyms: floccule |
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| flocculation | (noun) the process of flocculating; forming woolly cloudlike aggregations | - |
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| flocculator | (noun) An apparatus used in the process of flocculation. | - |
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| floccule | (noun) a small loosely aggregated mass of flocculent material suspended in or precipitated from a liquid | Synonyms: floc |
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| flock | (noun) a group of birds | - |
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| (noun) a group of sheep or goats | Synonyms: fold |
| (noun) a church congregation guided by a pastor | - |
| (noun) an orderly crowd | Synonyms: troop |
| (noun) (often followed by `of') a large number or amount or extent | Synonyms: batch, deal, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, muckle, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, stack, tidy sum, wad |
| floe | (noun) a flat mass of ice (smaller than an ice field) floating at sea | Synonyms: ice floe |
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| flogger | (noun) a torturer who flogs or scourges (especially an official whose duty is to whip offenders) | Synonyms: scourger |
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| flogging | (noun) beating with a whip or strap or rope as a form of punishment | Synonyms: flagellation, lashing, tanning, whipping |
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| flood | (noun) the act of flooding; filling to overflowing | Synonyms: flowage |
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| (noun) a large flow | Synonyms: outpouring, overflow |
| (noun) light that is a source of artificial illumination having a broad beam; used in photography | Synonyms: flood lamp, floodlight, photoflood |
| (noun) the occurrence of incoming water (between a low tide and the following high tide) | Synonyms: flood tide, rising tide |
| (noun) the rising of a body of water and its overflowing onto normally dry land | Synonyms: alluvion, deluge, inundation |
| (noun) an overwhelming number or amount | Synonyms: deluge, inundation, torrent |
| floodgate | (noun) regulator consisting of a valve or gate that controls the rate of water flow through a sluice | Synonyms: head gate, penstock, sluice valve, sluicegate, water gate |
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| (noun) something that restrains a flood or outpouring | - |
| floodhead | (noun) a wall of water rushing ahead of the flood | - |
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| flooding | (noun) a technique used in behavior therapy; client is flooded with experiences of a particular kind until becoming either averse to them or numbed to them | Synonyms: implosion therapy |
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| floodlight | (noun) light that is a source of artificial illumination having a broad beam; used in photography | Synonyms: flood, flood lamp, photoflood |
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| floodplain | (noun) a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding | Synonyms: flood plain |
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| floor | (noun) the inside lower horizontal surface (as of a room, hallway, tent, or other structure) | Synonyms: flooring |
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| (noun) a structure consisting of a room or set of rooms at a single position along a vertical scale | Synonyms: level, storey, story |
| (noun) a large room in a exchange where the trading is done | Synonyms: trading floor |
| (noun) the legislative hall where members debate and vote and conduct other business | - |
| (noun) the parliamentary right to address an assembly | - |
| (noun) a lower limit | Synonyms: base |
| (noun) the occupants of a floor | - |
| (noun) the bottom surface of any lake or other body of water | - |
| (noun) the ground on which people and animals move about | - |
| (noun) the lower inside surface of any hollow structure | - |
| floorboard | (noun) a board in the floor | Synonyms: floor board |
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| (noun) the floor of an automobile | - |
| flooring | (noun) the inside lower horizontal surface (as of a room, hallway, tent, or other structure) | Synonyms: floor |
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| (noun) building material used in laying floors | - |
| floorshow | (noun) a series of acts at a night club | Synonyms: cabaret, floor show |
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| floorwalker | (noun) an employee of a retail store who supervises sales personnel and helps with customer problems | Synonyms: shopwalker |
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| floozie | (noun) a prostitute who attracts customers by walking the streets | Synonyms: floozy, hooker, hustler, slattern, street girl, streetwalker |
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| floozy | (noun) a prostitute who attracts customers by walking the streets | Synonyms: floozie, hooker, hustler, slattern, street girl, streetwalker |
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| flop | (noun) the act of throwing yourself down; collapse; sink | Synonyms: collapse |
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| (noun) a complete failure | Synonyms: bust, fizzle |
| (noun) someone who is unsuccessful | Synonyms: dud, washout |
| (noun) an arithmetic operation performed on floating-point numbers | Synonyms: floating-point operation |
| flophouse | (noun) a cheap lodging house | Synonyms: dosshouse |
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| floppy | (noun) a small plastic magnetic disk enclosed in a stiff envelope with a radial slit; used to store data or programs for a microcomputer | Synonyms: diskette, floppy disk |
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| flora | (noun) (botany) a living organism lacking the power of locomotion | Synonyms: plant, plant life |
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| (noun) all the plant life in a particular region or period | Synonyms: botany, vegetation |
| florescence | (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, efflorescence, flowering, inflorescence |
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| floret | (noun) a diminutive flower (especially one that is part of a composite flower) | Synonyms: floweret |
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| floriculture | (noun) the cultivation of flowering plants | Synonyms: flower gardening |
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| floridity | (noun) extravagant elaborateness | Synonyms: flamboyance, floridness, showiness |
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| floridness | (noun) extravagant elaborateness | Synonyms: flamboyance, floridity, showiness |
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| florilegium | (noun) an anthology of short literary pieces and poems and ballads etc. | Synonyms: garland, miscellany |
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| florin | (noun) formerly the basic unit of money in the Netherlands; equal to 100 cents | Synonyms: Dutch florin, guilder, gulden |
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| (noun) the basic unit of money in Suriname; equal to 100 cents | Synonyms: guilder, gulden |
| florist | (noun) a shop where flowers and ornamental plants are sold | Synonyms: florist shop, flower store |
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| (noun) someone who grows and deals in flowers | - |
| floss | (noun) a soft loosely twisted thread used in embroidery | - |
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| (noun) a soft thread for cleaning the spaces between the teeth | Synonyms: dental floss |
| flotation | (noun) financing a commercial enterprise by bond or stock shares | Synonyms: floatation |
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| (noun) the phenomenon of floating (remaining on the surface of a liquid without sinking) | Synonyms: floatation |
| flotilla | (noun) a fleet of small craft | - |
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| (noun) a United States Navy fleet consisting of two or more squadrons of small warships | - |
| flotsam | (noun) the floating wreckage of a ship | Synonyms: jetsam |
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| flounce | (noun) the act of walking with exaggerated jerky motions | - |
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| (noun) a strip of pleated material used as a decoration or a trim | Synonyms: frill, furbelow, ruffle |
| flounder | (noun) any of various European and non-European marine flatfish | - |
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| (noun) flesh of any of various American and European flatfish | - |
| flour | (noun) fine powdery foodstuff obtained by grinding and sifting the meal of a cereal grain | - |
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| flouriness | (noun) The state or condition of resembling flour, of being a fine soft powder. | - |
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| flourish | (noun) the act of waving | Synonyms: brandish |
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| (noun) a display of ornamental speech or language | - |
| (noun) a showy gesture | - |
| (noun) (music) a short lively tune played on brass instruments | Synonyms: fanfare, tucket |
| (noun) an ornamental embellishment in writing | - |
| flouter | (noun) someone who jeers or mocks or treats something with contempt or calls out in derision | Synonyms: jeerer, mocker, scoffer |
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| flow | (noun) the act of flowing or streaming; continuous progression | Synonyms: stream |
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| (noun) the motion characteristic of fluids (liquids or gases) | Synonyms: flowing |
| (noun) dominant course (suggestive of running water) of successive events or ideas | Synonyms: current, stream |
| (noun) any uninterrupted stream or discharge | - |
| (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: catamenia, menses, menstruation, menstruum, period |
| (noun) something that resembles a flowing stream in moving continuously | Synonyms: stream |
| (noun) the amount of fluid that flows in a given time | Synonyms: flow rate, rate of flow |
| flowage | (noun) the act of flooding; filling to overflowing | Synonyms: flood |
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| (noun) a body of water that has been created by deliberately flooding an area | - |
| (noun) gradual internal motion or deformation of a solid body (as by heat) | - |
| flowchart | (noun) a diagram of the sequence of operations in a computer program or an accounting system | Synonyms: flow chart, flow diagram, flow sheet |
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| flower | (noun) a plant cultivated for its blooms or blossoms | - |
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| (noun) reproductive organ of angiosperm plants especially one having showy or colorful parts | Synonyms: bloom, blossom |
| (noun) the period of greatest prosperity or productivity | Synonyms: bloom, blossom, efflorescence, flush, heyday, peak, prime |
| flowerbed | (noun) a bed in which flowers are growing | Synonyms: bed of flowers, flower bed |
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| floweret | (noun) a diminutive flower (especially one that is part of a composite flower) | Synonyms: floret |
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| flowering | (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, efflorescence, florescence, inflorescence |
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| (noun) a developmental process | Synonyms: unfolding |
| flowerpot | (noun) a container in which plants are cultivated | Synonyms: pot |
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| flowing | (noun) the motion characteristic of fluids (liquids or gases) | Synonyms: flow |
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| floxuridine | (noun) antineoplastic drug used to treat some cancers; can cause loss of hair | - |
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| foamflower | (noun) stoloniferous white-flowered spring-blooming woodland plant | Synonyms: coolwart, false miterwort, false mitrewort, Tiarella cordifolia |
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| gigaflop | (noun) a unit of measure for the calculating speed of a computer equal to one billion floating point operations per second. | Synonyms: billion floating point operations per second, GFLOPS |
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| gillyflower | (noun) Eurasian plant with pink to purple-red spice-scented usually double flowers; widely cultivated in many varieties and many colors | Synonyms: carnation, clove pink, Dianthus caryophyllus |
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| (noun) any of several Old World plants cultivated for their brightly colored flowers | Synonyms: stock |
| globeflower | (noun) any of several plants of the genus Trollius having globose yellow flowers | Synonyms: globe flower |
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| helmetflower | (noun) a herbaceous plant of the genus Scutellaria which has a calyx that, when inverted, resembles a helmet with its visor raised | Synonyms: skullcap |
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| (noun) a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite | Synonyms: Aconitum napellus, helmet flower, monkshood |
| (noun) any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process | Synonyms: helmet orchid |
| honeyflower | (noun) Australian shrub whose flowers yield honey copiously | Synonyms: honey-flower, Protea mellifera |
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| (noun) erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar | Synonyms: honey-flower, Lambertia formosa, mountain devil |
| inflorescence | (noun) the flowering part of a plant or arrangement of flowers on a stalk | - |
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| (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, efflorescence, florescence, flowering |
| inflow | (noun) the process of flowing in | Synonyms: influx |
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| lyreflower | (noun) garden plant having deep-pink drooping heart-shaped flowers | Synonyms: bleeding heart, Dicentra spectabilis, lyre-flower |
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| mayflower | (noun) low-growing evergreen shrub of eastern North America with leathery leaves and clusters of fragrant pink or white flowers | Synonyms: Epigaea repens, trailing arbutus |
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| mefloquine | (noun) an antimalarial drug (trade name Lariam and Mephaquine) that is effective in cases that do not respond to chloroquine; said to produce harmful neuropsychiatric effects on some people | Synonyms: Lariam, mefloquine hydrochloride, Mephaquine |
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| megaflop | (noun) (computer science) a unit for measuring the speed of a computer system, one megaflops is a million floating point operations per second | Synonyms: MFLOP, million floating point operations per second |
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| microflora | (noun) microscopic plants; bacteria are often considered to be microflora | - |
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| mistflower | (noun) rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium | Synonyms: ageratum, Conoclinium coelestinum, Eupatorium coelestinum, mist-flower |
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| moonflower | (noun) pantropical climber having white fragrant nocturnal flowers | Synonyms: belle de nuit, Ipomoea alba |
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| moufflon | (noun) wild mountain sheep of Corsica and Sardinia | Synonyms: mouflon, Ovis musimon |
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| mouflon | (noun) wild mountain sheep of Corsica and Sardinia | Synonyms: moufflon, Ovis musimon |
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| multiflora | (noun) vigorously growing rose having clusters of numerous small flowers; used for hedges and as grafting stock | Synonyms: baby rose, Japanese rose, multiflora rose, Rosa multiflora |
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| outflow | (noun) the discharge of a fluid from some container | Synonyms: escape, leak, leakage |
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| (noun) a natural flow of ground water | Synonyms: fountain, natural spring, outpouring, spring |
| (noun) the process of flowing out | Synonyms: effluence, efflux |