| exuviae | (noun) cast-off skins or coverings of various organisms during ecdysis | - |
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| fauvism | (noun) an art movement launched in 1905 whose work was characterized by bright and nonnatural colors and simple forms; influenced the expressionists | - |
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| fauvist | (noun) a member of a group of French painters who followed fauvism | Synonyms: Fauve |
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| favism | (noun) anemia resulting from eating fava beans; victims have an inherited blood abnormality and enzyme deficiency | - |
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| fervidness | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervor, fervour, fire |
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| festivity | (noun) any joyous diversion | Synonyms: celebration |
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| filovirus | (noun) animal viruses belonging to the family Filoviridae | - |
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| flavin | (noun) a ketone that forms the nucleus of certain natural yellow pigments like riboflavin | - |
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| flavivirus | (noun) animal viruses belonging to the family Flaviviridae | - |
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| flerovium | (noun) a radioactive transuranic element | Synonyms: Fl |
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| forgivingness | (noun) tendency to be kind and forgiving | Synonyms: kindness |
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| gavial | (noun) large fish-eating Indian crocodilian with a long slender snout | Synonyms: Gavialis gangeticus |
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| gingivitis | (noun) inflammation of the gums | - |
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| giving | (noun) the act of giving | Synonyms: gift |
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| (noun) disposing of property by voluntary transfer without receiving value in return | - |
| (noun) the imparting of news or promises etc. | - |
| grapevine | (noun) gossip spread by spoken communication | Synonyms: pipeline, word of mouth |
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| (noun) any of numerous woody vines of genus Vitis bearing clusters of edible berries | Synonyms: grape, grape vine |
| gravida | (noun) a pregnant woman | - |
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| (noun) the number of the pregnancy that a woman is in | - |
| gravidation | (noun) technical terms for pregnancy | Synonyms: gravidity, gravidness |
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| gravidity | (noun) technical terms for pregnancy | Synonyms: gravidation, gravidness |
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| gravidness | (noun) technical terms for pregnancy | Synonyms: gravidation, gravidity |
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| gravimeter | (noun) a measuring instrument for determining the specific gravity of a liquid or solid | Synonyms: hydrometer |
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| (noun) a measuring instrument for measuring variations in the gravitational field of the earth | Synonyms: gravity meter |
| gravimetry | (noun) the measurement of specific gravity | Synonyms: hydrometry |
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| gravitas | (noun) formality in bearing and appearance | Synonyms: dignity, lordliness |
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| gravitation | (noun) a figurative movement toward some attraction | - |
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| (noun) movement downward resulting from gravitational attraction | - |
| (noun) (physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface | Synonyms: gravitational attraction, gravitational force, gravity |
| graviton | (noun) a gauge boson that mediates the (extremely weak) gravitational interactions between particles | - |
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| gravity | (noun) a manner that is serious and solemn | Synonyms: graveness, soberness, sobriety, somberness, sombreness |
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| (noun) a solemn and dignified feeling | Synonyms: solemnity |
| (noun) (physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface | Synonyms: gravitation, gravitational attraction, gravitational force |
| grevillea | (noun) any shrub or tree of the genus Grevillea | - |
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| griseofulvin | (noun) a kind of penicillin (a fungicidal antibiotic with the trade name Fulvicin) produced by molds of the genus Penicillium | Synonyms: Fulvicin |
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| grooving | (noun) the cutting of spiral grooves on the inside of the barrel of a firearm | Synonyms: rifling |
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| hairweaving | (noun) the act of interweaving a hairpiece with your own hair | - |
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| heaviness | (noun) the property of being comparatively great in weight | Synonyms: weightiness |
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| (noun) used of a line or mark | Synonyms: thickness |
| (noun) unwelcome burdensome difficulty | Synonyms: burdensomeness, onerousness, oppressiveness |
| (noun) an oppressive quality that is laborious and solemn and lacks grace or fluency | Synonyms: ponderousness |
| (noun) persisting sadness | - |
| heaving | (noun) throwing something heavy (with great effort) | Synonyms: heave |
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| (noun) breathing heavily (as after exertion) | Synonyms: panting |
| (noun) the act of lifting something with great effort | Synonyms: heave |
| (noun) an upward movement (especially a rhythmical rising and falling) | Synonyms: heave |
| hepadnavirus | (noun) a group of animal DNA viruses including viruses of ducks and woodchucks and squirrels and others as well as the virus causing hepatitis B in humans | - |
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| hepatoflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: lactoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G |
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| hyperactivity | (noun) a condition characterized by excessive restlessness and movement | - |
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| hypersensitivity | (noun) extreme sensitivity | - |
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| (noun) pathological sensitivity | - |
| hypervitaminosis | (noun) an abnormal condition resulting from taking vitamins excessively; can be serious for vitamins A or D or K | - |
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| hypovitaminosis | (noun) any of several diseases caused by deficiency of one or more vitamins | Synonyms: avitaminosis |
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| impassivity | (noun) apathy demonstrated by an absence of emotional reactions | Synonyms: emotionlessness, impassiveness, indifference, phlegm, stolidity, unemotionality |
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| imperviousness | (noun) the quality of being impenetrable (by people or light or missiles etc.) | Synonyms: impenetrability |
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| improvidence | (noun) a lack of prudence and care by someone in the management of resources | Synonyms: shortsightedness |
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| improvisation | (noun) an unplanned expedient | Synonyms: temporary expedient |
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| (noun) a performance given extempore without planning or preparation | Synonyms: extemporisation, extemporization |
| (noun) a creation spoken or written or composed extemporaneously (without prior preparation) | - |
| inactivity | (noun) being inactive; being less active | - |
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| (noun) a disposition to remain inactive or inert | Synonyms: inactiveness, inertia |
| (noun) the state of being inactive | Synonyms: inaction, inactiveness |
| inadvisability | (noun) the quality of being ill-advised | - |
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| incivility | (noun) deliberate discourtesy | - |
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| indinavir | (noun) a protease inhibitor (trade name Crixivan) used for treating HIV | Synonyms: Crixivan |
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| individual | (noun) a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential | Synonyms: mortal, person, somebody, someone, soul |
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| (noun) a single organism | - |
| individualisation | (noun) discriminating the individual from the generic group or species | Synonyms: individualization, individuation |
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| individualism | (noun) the quality of being individual | Synonyms: individuality, individuation |
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| (noun) the doctrine that government should not interfere in commercial affairs | Synonyms: laissez faire |
| (noun) a belief in the importance of the individual and the virtue of self-reliance and personal independence | - |
| individualist | (noun) a person who pursues independent thought or action | - |
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| individuality | (noun) the quality of being individual | Synonyms: individualism, individuation |
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| (noun) the distinct personality of an individual regarded as a persisting entity | Synonyms: identity, personal identity |
| individualization | (noun) discriminating the individual from the generic group or species | Synonyms: individualisation, individuation |
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| individuation | (noun) the quality of being individual | Synonyms: individualism, individuality |
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| (noun) discriminating the individual from the generic group or species | Synonyms: individualisation, individualization |
| indivisibility | (noun) (arithmetic) The state of being impossible to divide by a specific integer without leaving a remainder. | - |
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| inevitability | (noun) the quality of being unavoidable | Synonyms: inevitableness |
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| inevitable | (noun) an unavoidable event | - |
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| inevitableness | (noun) the quality of being unavoidable | Synonyms: inevitability |
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| insensitivity | (noun) the inability to respond to affective changes in your interpersonal environment | Synonyms: insensitiveness |
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| interview | (noun) a conference (usually with someone important) | Synonyms: audience, consultation |
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| (noun) the questioning of a person (or a conversation in which information is elicited); often conducted by journalists | - |
| interviewee | (noun) a person who is interviewed | - |
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| interviewer | (noun) a person who conducts an interview | - |
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| intransitivity | (noun) the grammatical relation created by an intransitive verb | Synonyms: intransitiveness |
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| invidia | (noun) spite and resentment at seeing the success of another (personified as one of the deadly sins) | Synonyms: envy |
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| invigilation | (noun) keeping watch over examination candidates to prevent cheating | - |
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| invigilator | (noun) someone who watches examination candidates to prevent cheating | - |
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| invigoration | (noun) the activity of giving vitality and vigour to something | Synonyms: animation, vivification |
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| (noun) quality of being active or spirited or alive and vigorous | Synonyms: animation, brio, spiritedness, vivification |
| invigorator | (noun) an agent that gives or restores life or vigor | Synonyms: enlivener, quickener |
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| invincibility | (noun) the property being difficult or impossible to defeat | Synonyms: indomitability |
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| invisibility | (noun) the quality of not being perceivable by the eye | Synonyms: invisibleness |
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| invisibleness | (noun) the quality of not being perceivable by the eye | Synonyms: invisibility |
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| invitation | (noun) a tempting allurement | - |
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| (noun) a request (spoken or written) to participate or be present or take part in something | - |
| invite | (noun) a colloquial expression for invitation | - |
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| invitee | (noun) a visitor to whom hospitality is extended | Synonyms: guest |
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| joviality | (noun) a jovial nature | Synonyms: conviviality |
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| (noun) feeling jolly and jovial and full of good humor | Synonyms: jolliness, jollity |
| kelvin | (noun) the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites | Synonyms: K |
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| keratoconjunctivitis | (noun) inflammation of the cornea and conjunctiva | - |
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| lactoflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: hepatoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G |
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| larvicide | (noun) a chemical used to kill larval pests | - |
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| lasciviousness | (noun) feeling morbid sexual desire or a propensity to lewdness | Synonyms: carnality, lubricity, prurience, pruriency |
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| lavishness | (noun) the activity of excessive spending | Synonyms: extravagance, high life, highlife, prodigality |
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| (noun) the quality possessed by something that is excessively expensive | Synonyms: luxury, sumptuosity, sumptuousness |
| leaving | (noun) the act of departing | Synonyms: departure, going, going away |
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| leviathan | (noun) the largest or most massive thing of its kind | - |
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| (noun) monstrous sea creature symbolizing evil in the Old Testament | - |
| levirate | (noun) the biblical institution whereby a man must marry the widow of his childless brother in order to maintain the brother's line | - |
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| levis | (noun) a popular brand of jeans | Synonyms: Levi's |
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| levitation | (noun) the act of raising (a body) from the ground by presumably spiritualistic means | - |
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| (noun) movement upward in virtue of lightness | - |
| (noun) the phenomenon of a person or thing rising into the air by apparently supernatural means | - |
| levity | (noun) a manner lacking seriousness | - |
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| (noun) feeling an inappropriate lack of seriousness | - |
| lifesaving | (noun) saving the lives of drowning persons | - |
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| lividity | (noun) unnatural lack of color in the skin (as from bruising or sickness or emotional distress) | Synonyms: achromasia, lividness, luridness, paleness, pallidness, pallor, wanness |
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| (noun) a state of fury so great the face becomes discolored | - |
| lividness | (noun) unnatural lack of color in the skin (as from bruising or sickness or emotional distress) | Synonyms: achromasia, lividity, luridness, paleness, pallidness, pallor, wanness |
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| living | (noun) the experience of being alive; the course of human events and activities | Synonyms: life |
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| (noun) people who are still living | - |
| (noun) the financial means whereby one lives | Synonyms: bread and butter, keep, livelihood, support, sustenance |
| (noun) the condition of living or the state of being alive | Synonyms: aliveness, animation, life |
| longevity | (noun) duration of service | Synonyms: length of service |
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| (noun) the property of being long-lived | Synonyms: seniority |
| lovingness | (noun) a quality proceeding from feelings of affection or love | Synonyms: affectionateness, fondness, warmth |
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| (noun) a loving feeling | Synonyms: caring |
| lyssavirus | (noun) a neurotropic non-arbovirus of the family Rhabdoviridae that causes rabies | - |
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| maravilla | (noun) leafy wildflower having fragrant slender white or pale pink trumpet-shaped flowers; southwestern United States and northern Mexico | Synonyms: Mirabilis longiflora, sweet four o'clock |
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| (noun) wildflower having vibrant deep pink tubular evening-blooming flowers; found in sandy and desert areas from southern California to southern Colorado and into Mexico | Synonyms: Colorado four o'clock, desert four o'clock, Mirabilis multiflora |
| mavin | (noun) someone who is dazzlingly skilled in any field | Synonyms: ace, adept, champion, genius, hotshot, maven, sensation, star, superstar, virtuoso, whiz, whizz, wiz, wizard |
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| mavis | (noun) common Old World thrush noted for its song | Synonyms: song thrush, throstle, Turdus philomelos |
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| mendelevium | (noun) a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol) | Synonyms: atomic number 101, Md, Mv |
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| microdevice | (noun) any very small device manufactured using microfabrication. | - |
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| misbehavior | (noun) improper or wicked or immoral behavior | Synonyms: misbehaviour, misdeed |
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| misbehaviour | (noun) improper or wicked or immoral behavior | Synonyms: misbehavior, misdeed |
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| misgiving | (noun) doubt about someone's honesty | Synonyms: distrust, mistrust, suspicion |
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| (noun) painful expectation | Synonyms: apprehension |
| (noun) uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety) | Synonyms: qualm, scruple |