| acorea | (noun) absence of the pupil in an eye | - |
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| adorer | (noun) someone who admires a young woman | Synonyms: admirer |
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| aeciospore | (noun) spore of a rust fungus formed in an aecium | - |
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| afforestation | (noun) the conversion of bare or cultivated land into forest (originally for the purpose of hunting) | - |
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| albacore | (noun) large pelagic tuna the source of most canned tuna; reaches 93 pounds and has long pectoral fins; found worldwide in tropical and temperate waters | Synonyms: long-fin tunny, Thunnus alalunga |
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| (noun) relatively small tuna with choice white flesh; major source of canned tuna | - |
| allegoresis | (noun) the interpretation of written, oral, or artistic expression as allegory. | - |
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| anorectic | (noun) a person suffering from anorexia nervosa | Synonyms: anorexic |
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| anorexia | (noun) a prolonged disorder of eating due to loss of appetite | - |
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| anorexic | (noun) a person suffering from anorexia nervosa | Synonyms: anorectic |
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| antheridiophore | (noun) gametophore bearing antheridia as in certain mosses and liverworts | - |
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| apishamore | (noun) a saddle blanket made of buffalo hide | - |
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| arboretum | (noun) a facility where trees and shrubs are cultivated for exhibition | Synonyms: botanical garden |
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| archespore | (noun) primitive cell or group of cells from which a mother cell develops | Synonyms: archesporium |
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| armorer | (noun) a manufacturer of firearms | Synonyms: armourer |
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| (noun) an enlisted man responsible for the upkeep of small arms and machine guns etc. | Synonyms: armourer, artificer |
| (noun) a worker skilled in making armor or arms | Synonyms: armourer |
| arthrospore | (noun) one of a string of thick walled vegetative resting cells formed by some algae and fungi | - |
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| (noun) a body that resembles a spore but is not an endospore; produced by some bacteria | - |
| ascospore | (noun) sexually produced fungal spore formed within an ascus | - |
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| authoress | (noun) a woman author | - |
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| autofluorescence | (noun) self-induced fluorescence | - |
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| autoregulation | (noun) (physiology) processes that maintain a generally constant physiological state in a cell or organism | - |
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| bachelorette | (noun) a young unmarried woman who lives alone | Synonyms: bachelor girl |
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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| basidiospore | (noun) a sexually produced fungal spore borne on a basidium | - |
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| battledore | (noun) an ancient racket game | Synonyms: battledore and shuttlecock |
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| (noun) a light long-handled racket used by badminton players | Synonyms: badminton racket, badminton racquet |
| bedsore | (noun) a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients) | Synonyms: decubitus ulcer, pressure sore |
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| bioremediation | (noun) the act of treating waste or pollutants by the use of microorganisms (as bacteria) that can break down the undesirable substances | - |
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| (noun) the branch of biotechnology that uses biological process to overcome environmental problems | - |
| blastopore | (noun) the opening into the archenteron | - |
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| bookstore | (noun) a shop where books are sold | Synonyms: bookshop, bookstall |
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| bore | (noun) a hole or passage made by a drill; usually made for exploratory purposes | Synonyms: bore-hole, drill hole |
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| (noun) diameter of a tube or gun barrel | Synonyms: caliber, calibre, gauge |
| (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: aegir, eager, eagre, tidal bore |
| (noun) a person who evokes boredom | Synonyms: dullard |
| boreas | (noun) a wind that blows from the north | Synonyms: north wind, norther, northerly |
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| borecole | (noun) a hardy cabbage with coarse curly leaves that do not form a head | Synonyms: Brassica oleracea acephala, cole, colewort, kail, kale |
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| boredom | (noun) the feeling of being bored by something tedious | Synonyms: ennui, tedium |
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| borer | (noun) any of various insects or larvae or mollusks that bore into wood | Synonyms: woodborer |
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| (noun) a drill for penetrating rock | Synonyms: bore bit, rock drill, stone drill |
| carnivore | (noun) a terrestrial or aquatic flesh-eating mammal | - |
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| (noun) any animal that feeds on flesh | - |
| carpophore | (noun) a slender stalk that furnishes an axis for a carpel | - |
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| carpospore | (noun) a nonmotile spore of red algae | - |
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| cataphoresis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: dielectrolysis, electrophoresis, ionophoresis |
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| categorem | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categoreme |
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| categoreme | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categorem |
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| chemoreceptor | (noun) a sensory receptor that responds to chemical stimuli | - |
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| chlamydospore | (noun) thick-walled asexual resting spore of certain fungi and algae | - |
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| chlamyphore | (noun) very small Argentine armadillo with pale silky hair and pink plates on head and neck | Synonyms: Chlamyphorus truncatus, fairy armadillo, pichiciago, pichiciego |
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| chlorella | (noun) any alga of the genus Chlorella | - |
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| chlorenchyma | (noun) parenchyma whose cells contain chloroplasts | - |
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| chore | (noun) a specific piece of work required to be done as a duty or for a specific fee | Synonyms: job, task |
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| chorea | (noun) any of several degenerative nervous disorders characterized by spasmodic movements of the body and limbs | - |
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| (noun) chorea in dogs | Synonyms: canine chorea |
| choreographer | (noun) someone who creates new dances | - |
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| choreography | (noun) a show involving artistic dancing | Synonyms: stage dancing |
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| (noun) the representation of dancing by symbols as music is represented by notes | - |
| (noun) a notation used by choreographers | - |
| chorioretinitis | (noun) inflammation of the choroid layer behind the retina | - |
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| chromophore | (noun) the chemical group that gives color to a molecule | - |
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| claymore | (noun) an antipersonnel land mine whose blast is aimed at the oncoming enemy | Synonyms: claymore mine |
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| (noun) a large double-edged broadsword; formerly used by Scottish Highlanders | - |
| colored | (noun) a United States term for Blacks that is now considered offensive | Synonyms: colored person, coloured, coloured person |
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| commodore | (noun) a commissioned naval officer who ranks above a captain and below a rear admiral; the lowest grade of admiral | - |
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| conidiophore | (noun) a specialized fungal hypha that produces conidia | - |
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| conidiospore | (noun) an asexually produced fungal spore formed on a conidiophore | Synonyms: conidium |
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| core | (noun) a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil | - |
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| (noun) the chamber of a nuclear reactor containing the fissile material where the reaction takes place | - |
| (noun) (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories | Synonyms: magnetic core |
| (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: center, centre, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum |
| (noun) the central meaning or theme of a speech or literary work | Synonyms: burden, effect, essence, gist |
| (noun) a small group of indispensable persons or things | Synonyms: core group, nucleus |
| (noun) the center of an object | - |
| (noun) the central part of the Earth | - |
| (noun) a cylindrical sample of soil or rock obtained with a hollow drill | - |
| coreference | (noun) the grammatical relation between two words that have a common referent | - |
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| coreid | (noun) a true bug | Synonyms: coreid bug |
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| coreligionist | (noun) someone having the same religion as another person | - |
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| coreopsis | (noun) any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America | Synonyms: tick-weed, tickseed, tickweed |
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| corer | (noun) a device for removing the core from apples | - |
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| corespondent | (noun) the codefendant charged with adultery with the estranged spouse in a divorce proceeding | Synonyms: co-respondent |
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| corporeality | (noun) the quality of being physical; consisting of matter | Synonyms: corporality, materiality, physicalness |
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| counterbore | (noun) a bit for enlarging the upper part of a hole | Synonyms: countersink, countersink bit |
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| crore | (noun) the number that is represented as a one followed by 7 zeros; ten million | - |
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| ctenophore | (noun) biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb | Synonyms: comb jelly |
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| deforestation | (noun) the removal of trees | Synonyms: disforestation |
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| (noun) the state of being clear of trees | - |
| dehydroretinol | (noun) a viscous alcohol that is less active in mammals than is vitamin A1 | Synonyms: vitamin A2 |
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| diaphoresis | (noun) the process of the sweat glands of the skin secreting a salty fluid | Synonyms: hidrosis, perspiration, sudation, sweating |
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| diaphoretic | (noun) used to produce perspiration | - |
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| disforestation | (noun) the removal of trees | Synonyms: deforestation |
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| drugstore | (noun) a retail shop where medicine and other articles are sold | Synonyms: apothecary's shop, chemist's, chemist's shop, pharmacy |
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| 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 |
| electrophoresis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: cataphoresis, dielectrolysis, ionophoresis |
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| electroretinogram | (noun) a graphical recording of the electrical activity of the retina that results when light is flashed into the eye | - |
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| enamoredness | (noun) a feeling of love or fondness | Synonyms: amorousness |
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| encore | (noun) an extra or repeated performance; usually given in response to audience demand | - |
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| endospore | (noun) a small asexual spore that develops inside the cell of some bacteria and algae | - |
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| explorer | (noun) someone who travels into little known regions (especially for some scientific purpose) | Synonyms: adventurer |
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| eyesore | (noun) something very ugly and offensive | - |
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| flavorer | (noun) something added to food primarily for the savor it imparts | Synonyms: flavoring, flavourer, flavouring, seasoner, seasoning |
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| 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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| fluorescein | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluoresceine, fluorescent dye, resorcinolphthalein |
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| fluoresceine | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluorescein, fluorescent dye, resorcinolphthalein |
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| fluorescence | (noun) light emitted during absorption of radiation of some other (invisible) wavelength | - |
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| fluorescent | (noun) a lighting fixture that uses a fluorescent lamp | Synonyms: fluorescent fixture |
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| folklore | (noun) the unwritten lore (stories and proverbs and riddles and songs) of a culture | - |
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| fore | (noun) front part of a vessel or aircraft | Synonyms: bow, prow, stem |
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| forearm | (noun) the part of the superior limb between the elbow and the wrist | - |
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| forebear | (noun) a person from whom you are descended | Synonyms: forbear |
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| foreboding | (noun) an unfavorable omen | - |
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| (noun) a feeling of evil to come | Synonyms: boding, premonition, presentiment |
| forebrain | (noun) the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube | Synonyms: prosencephalon |
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| forecarriage | (noun) a small wheeled carriage attached under the front end of a plow beam. | Synonyms: fore carriage, wheeled forecarriage |
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| forecast | (noun) a prediction about how something (as the weather) will develop | Synonyms: prognosis |
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| forecaster | (noun) someone who makes predictions of the future (usually on the basis of special knowledge) | Synonyms: predictor, prognosticator, soothsayer |
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| forecasting | (noun) a statement made about the future | Synonyms: foretelling, prediction, prognostication |
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| forecastle | (noun) living quarters consisting of a superstructure in the bow of a merchant ship where the crew is housed | Synonyms: fo'c'sle |
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| foreclosure | (noun) the legal proceedings initiated by a creditor to repossess the collateral for loan that is in default | - |
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| forecourt | (noun) the outer or front court of a building or of a group of buildings | - |
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| foredeck | (noun) the deck between the bridge and the forecastle | - |
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