| anaspid | (noun) extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian | - |
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| aspidistra | (noun) evergreen perennial with large handsome basal leaves; grown primarily as a foliage houseplant | Synonyms: Aspidistra elatio, bar-room plant, cast-iron plant |
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| bicuspid | (adjective) having two cusps or points (especially a molar tooth) | Synonyms: bicuspidate |
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| (noun) a tooth having two cusps or points; located between the incisors and the molars | Synonyms: premolar |
| bicuspidate | (adjective) having two cusps or points (especially a molar tooth) | Synonyms: bicuspid |
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| cephalaspid | (noun) extinct jawless fish of the Devonian with armored head | Synonyms: osteostracan |
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| chrysopid | (noun) pale green unpleasant-smelling lacewing fly having carnivorous larvae | Synonyms: green lacewing, stink fly |
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| cupid | (noun) a symbol for love in the form of a cherubic naked boy with wings and a bow and arrow | - |
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| cupidity | (noun) extreme greed for material wealth | Synonyms: avarice, avariciousness, covetousness |
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| cuspid | (noun) one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars | Synonyms: canine, canine tooth, dogtooth, eye tooth, eyetooth |
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| cuspidal | (adjective) having cusps or points | Synonyms: cuspate, cuspated, cusped, cuspidate, cuspidated |
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| cuspidate | (adjective) having cusps or points | Synonyms: cuspate, cuspated, cusped, cuspidal, cuspidated |
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| cuspidated | (adjective) having cusps or points | Synonyms: cuspate, cuspated, cusped, cuspidal, cuspidate |
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| cuspidation | (noun) a decoration using cusps | - |
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| cuspidor | (noun) a receptacle for spit (usually in a public place) | Synonyms: spittoon |
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| dilapidate | (verb) fall into decay or ruin | Synonyms: crumble, decay |
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| (verb) bring into a condition of decay or partial ruin by neglect or misuse | - |
| dilapidated | (adjective) in deplorable condition | Synonyms: bedraggled, broken-down, derelict, ramshackle, tatterdemalion, tumble-down |
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| dilapidation | (noun) the process of becoming dilapidated | Synonyms: ruin |
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| (noun) a state of deterioration due to old age or long use | Synonyms: decrepitude |
| elapid | (noun) any of numerous venomous fanged snakes of warmer parts of both hemispheres | Synonyms: elapid snake |
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| epideictic | (adjective) designed primarily for rhetorical display | Synonyms: epideictical |
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| epideictical | (adjective) designed primarily for rhetorical display | Synonyms: epideictic |
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| epidemic | (adjective) (especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously | - |
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| (noun) a widespread outbreak of an infectious disease; many people are infected at the same time | - |
| epidemiologic | (adjective) of or relating to epidemiology | Synonyms: epidemiological |
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| epidemiological | (adjective) of or relating to epidemiology | Synonyms: epidemiologic |
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| epidemiologist | (noun) a medical scientist who studies the transmission and control of epidemic diseases | - |
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| epidemiology | (noun) the branch of medical science dealing with the transmission and control of disease | - |
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| epidendron | (noun) any of various orchids of the genus Epidendrum | - |
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| epidermal | (adjective) of or relating to a cuticle or cuticula | Synonyms: cuticular, dermal, epidermic |
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| epidermic | (adjective) of or relating to a cuticle or cuticula | Synonyms: cuticular, dermal, epidermal |
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| epidermis | (noun) the outer layer of the skin covering the exterior body surface of vertebrates | Synonyms: cuticle |
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| epidiascope | (noun) an optical projector that gives images of both transparent and opaque objects | - |
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| epididymis | (noun) a convoluted tubule in each testis; carries sperm to vas deferens | - |
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| epididymitis | (noun) painful inflammation of the epididymis | - |
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| epidural | (adjective) on or outside the dura mater | Synonyms: extradural |
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| (noun) regional anesthesia resulting from injection of an anesthetic into the epidural space of the spinal cord; sensation is lost in the abdominal and genital and pelvic areas; used in childbirth and gynecological surgery | Synonyms: epidural anaesthesia, epidural anesthesia |
| hispid | (adjective) (of animals or plants) having stiff coarse hairs or bristles | - |
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| hyperlipidaemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipidemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidaemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| insipid | (adjective) lacking taste or flavor or tang | Synonyms: bland, flat, flavorless, flavourless, savorless, savourless, vapid |
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| (adjective) lacking interest or significance or impact | Synonyms: jejune |
| insipidity | (noun) lacking any distinctive or interesting taste property | Synonyms: blandness, insipidness |
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| (noun) extreme dullness; lacking spirit or interest | Synonyms: boringness, dreariness, insipidness |
| insipidly | (adverb) in an insipid manner | - |
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| insipidness | (noun) lacking any distinctive or interesting taste property | Synonyms: blandness, insipidity |
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| (noun) extreme dullness; lacking spirit or interest | Synonyms: boringness, dreariness, insipidity |
| intrepid | (adjective) invulnerable to fear or intimidation | Synonyms: audacious, brave, dauntless, fearless, hardy, unfearing |
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| intrepidity | (noun) resolute courageousness | Synonyms: dauntlessness |
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| intrepidly | (adverb) without fear | Synonyms: dauntlessly, fearlessly |
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| lapidarian | (adjective) inscribed on stone | - |
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| lapidarist | (noun) an expert on precious stones and the art of cutting and engraving them | Synonyms: lapidary |
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| lapidary | (adjective) of or relating to precious stones or the art of working with them | - |
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| (noun) a skilled worker who cuts and engraves precious stones | Synonyms: lapidist |
| (noun) an expert on precious stones and the art of cutting and engraving them | Synonyms: lapidarist |
| lapidate | (verb) kill by throwing stones at | Synonyms: stone |
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| (verb) throw stones at | - |
| lapidation | (noun) the act of pelting with stones; punishment inflicted by throwing stones at the victim (even unto death) | Synonyms: stoning |
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| lapidator | (noun) an attacker who pelts the victim with stones (especially with intent to kill) | Synonyms: stoner |
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| lapidify | (verb) change into stone | Synonyms: petrify |
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| lapidist | (noun) a skilled worker who cuts and engraves precious stones | Synonyms: lapidary |
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| lasiocampid | (noun) medium-sized stout-bodied neutral-colored moths with comb-like antennae | Synonyms: lasiocampid moth |
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| lepidobotrys | (noun) African tree often classified in other families; similar to the Costa Rican caracolito in wood structure as well as in fruit and flowers and leaves and seeds | - |
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| lepidocrocite | (noun) a red to reddish brown mineral consisting of iron oxide hydroxide; often found in iron ores together with goethite | - |
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| lepidolite | (noun) a mineral of the mica group; an important source of lithium | - |
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| lepidomelane | (noun) a mica that is a biotite containing iron | - |
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| lepidophobia | (noun) a morbid fear of snakes | - |
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| lepidopteran | (noun) insect that in the adult state has four wings more or less covered with tiny scales | Synonyms: lepidopteron, lepidopterous insect |
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| lepidopterist | (noun) an entomologist who specializes in the collection and study of butterflies and moths | Synonyms: butterfly collector, lepidopterologist |
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| lepidopterologist | (noun) an entomologist who specializes in the collection and study of butterflies and moths | Synonyms: butterfly collector, lepidopterist |
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| lepidopterology | (noun) the branch of entomology dealing with Lepidoptera | Synonyms: lepidoptery |
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| lepidopteron | (noun) insect that in the adult state has four wings more or less covered with tiny scales | Synonyms: lepidopteran, lepidopterous insect |
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| lepidoptery | (noun) the branch of entomology dealing with Lepidoptera | Synonyms: lepidopterology |
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| lepidote | (adjective) rough to the touch; covered with scales or scurf | Synonyms: leprose, scabrous, scaly, scurfy |
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| limpid | (adjective) (of language) transparently clear; easily understandable | Synonyms: crystal clear, lucid, luculent, pellucid, perspicuous |
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| (adjective) transmitting light; able to be seen through with clarity | Synonyms: crystal clear, crystalline, lucid, pellucid, transparent |
| (adjective) clear and bright | Synonyms: liquid |
| limpidity | (noun) passing light without diffusion or distortion | Synonyms: pellucidity, pellucidness |
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| (noun) free from obscurity and easy to understand; the comprehensibility of clear expression | Synonyms: clarity, clearness, lucidity, lucidness, pellucidity |
| limpidly | (adverb) in a clear and lucid manner | Synonyms: lucidly, pellucidly, perspicuously |
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| lipid | (noun) an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates) | Synonyms: lipide, lipoid |
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| lipidaemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidaemia, hyperlipidemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidemia, lipoidaemia, lipoidemia |
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| lipide | (noun) an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates) | Synonyms: lipid, lipoid |
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| lipidemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidaemia, hyperlipidemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipoidaemia, lipoidemia |
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| lipidosis | (noun) a disorder of lipid metabolism; abnormal levels of certain fats accumulate in the body | - |
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| mantispid | (noun) insect that resembles a mantis; larvae are parasites in the nests of spiders and wasps | - |
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| phospholipid | (noun) any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membranes | - |
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| piddle | (noun) liquid excretory product | Synonyms: pee, piss, urine, water, weewee |
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| (verb) eliminate urine | Synonyms: make, make water, micturate, pass water, pee-pee, pee, piss, puddle, relieve oneself, spend a penny, take a leak, urinate, wee-wee, wee |
| (verb) waste time; spend one's time idly or inefficiently | Synonyms: piddle away, trifle, wanton, wanton away |
| piddling | (adjective) (informal) small and of little importance | Synonyms: fiddling, footling, lilliputian, little, niggling, petty, picayune, piffling, trivial |
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| piddock | (noun) marine bivalve that bores into rock or clay or wood by means of saw-like shells | - |
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| pidgin | (noun) an artificial language used for trade between speakers of different languages | - |
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| rapid | (adjective) done or occurring in a brief period of time | - |
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| (adjective) characterized by speed; moving with or capable of moving with high speed | Synonyms: speedy |
| (noun) a part of a river where the current is very fast | - |
| rapidity | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidness, speediness |
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| rapidly | (adverb) with speed | Synonyms: apace, chop-chop, in short order, quickly, speedily |
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| rapidness | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidity, speediness |
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| sapid | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavorsome, flavourful, flavourous, flavoursome, saporous |
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| sapidity | (noun) a pleasant flavor | Synonyms: sapidness |
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| (noun) the taste experience when a savoury condiment is taken into the mouth | Synonyms: flavor, flavour, nip, relish, savor, savour, smack, tang |
| sapidness | (noun) a pleasant flavor | Synonyms: sapidity |
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| spider | (noun) predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey | - |
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| (noun) a skillet made of cast iron | - |
| (noun) a computer program that prowls the internet looking for publicly accessible resources that can be added to a database; the database can then be searched with a search engine | Synonyms: wanderer |
| spiderflower | (noun) any of various often strong-smelling plants of the genus Cleome having showy spider-shaped flowers | Synonyms: cleome |
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| spiderlike | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, arachnoid, spiderly, spidery |
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| spiderly | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, arachnoid, spiderlike, spidery |
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| spiderwort | (noun) any plant of the family Commelinaceae | Synonyms: dayflower |
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| spidery | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, arachnoid, spiderlike, spiderly |
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| stupid | (adjective) lacking or marked by lack of intellectual acuity | - |
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| (adjective) lacking intelligence | Synonyms: unintelligent |
| (adjective) in a state of mental numbness especially as resulting from shock | Synonyms: dazed, stunned, stupefied |
| (noun) a person who is not very bright | Synonyms: dolt, dullard, pillock, poor fish, pudden-head, pudding head, stupe, stupid person |
| stupidity | (noun) a stupid mistake | Synonyms: betise, folly, foolishness, imbecility |
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| (noun) a poor ability to understand or to profit from experience | - |
| stupidly | (adverb) in a stupid manner | Synonyms: doltishly |
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| tepid | (adjective) feeling or showing little interest or enthusiasm | Synonyms: half-hearted, halfhearted, lukewarm |
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| (adjective) moderately warm | Synonyms: lukewarm |
| tepidity | (noun) a warmness resembling the temperature of the skin | Synonyms: lukewarmness, tepidness |
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| tepidly | (adverb) in an unenthusiastically lukewarm manner | Synonyms: lukewarmly |
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| tepidness | (noun) a warmness resembling the temperature of the skin | Synonyms: lukewarmness, tepidity |
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| (noun) lack of passion, force or animation | Synonyms: lukewarmness |
| thripid | (noun) any of various small to minute sucking insects with narrow feathery wings if any; they feed on plant sap and many are destructive | Synonyms: thrip, thrips |
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| torpid | (adjective) in a condition of biological rest or suspended animation | Synonyms: dormant, hibernating |
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| (adjective) slow and apathetic | Synonyms: inert, sluggish, soggy |