| diaspora | (noun) the dispersion or spreading of something that was originally localized (as a people or language or culture) | - |
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| (noun) the body of Jews (or Jewish communities) outside Palestine or modern Israel | - |
| diastasis | (noun) separation of an epiphysis from the long bone to which it is normally attached without fracture of the bone | - |
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| diastema | (noun) a gap or vacant space between two teeth | - |
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| diastole | (noun) the widening of the chambers of the heart between two contractions when the chambers fill with blood | - |
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| diastolic | (adjective) of or relating to a diastole or happening during a diastole | - |
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| diastrophism | (noun) the process of deformation that produces continents and ocean basins in the earth's crust | - |
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| diathermy | (noun) a method of physical therapy that involves generating local heat in body tissues by high-frequency electromagnetic currents | - |
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| diathesis | (noun) constitutional predisposition to a particular disease or abnormality | - |
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| diatom | (noun) microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica | - |
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| diatomic | (adjective) of or relating to a molecule made up of two atoms | - |
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| diatomite | (noun) a light soil consisting of siliceous diatom remains and often used as a filtering material | Synonyms: diatomaceous earth, kieselguhr |
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| diatonic | (adjective) based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals | - |
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| (adjective) based on or using the five tones and two semitones of the major or minor scales of western music | - |
| diatribe | (noun) thunderous verbal attack | Synonyms: fulmination |
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| diazepam | (noun) a tranquilizer (trade name Valium) used to relieve anxiety and relax muscles; acts by enhancing the inhibitory actions of the neurotransmitter GABA; can also be used as an anticonvulsant drug in cases of nerve agent poisoning | Synonyms: Valium |
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| diazo | (adjective) relating to or containing diazonium | - |
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| diazonium | (noun) the univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes | - |
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| diazotize | (verb) convert (an amine) into a diazo compound | - |
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| diazoxide | (noun) vasodilator (trade name Hyperstat) used to treat severe hypertension | Synonyms: Hyperstat |
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| dibber | (noun) a wooden hand tool with a pointed end; used to make holes in the ground for planting seeds or bulbs | Synonyms: dibble |
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| dibble | (noun) a wooden hand tool with a pointed end; used to make holes in the ground for planting seeds or bulbs | Synonyms: dibber |
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| (verb) plant with a wooden hand tool | - |
| (verb) make a hole with a wooden hand tool | - |
| dibbuk | (noun) (Jewish folklore) a demon that enters the body of a living person and controls that body's behavior | Synonyms: dybbuk |
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| dibrach | (noun) a metrical unit with unstressed-unstressed syllables | Synonyms: pyrrhic |
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| dibranch | (noun) cephalopods having two gills | Synonyms: dibranchiate, dibranchiate mollusk |
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| dibranchiate | (noun) cephalopods having two gills | Synonyms: dibranch, dibranchiate mollusk |
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| dibs | (noun) a claim of rights | - |
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| dibucaine | (noun) a local anesthetic that is administered by injection | - |
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| dicamptodon | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodontid |
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| dicamptodontid | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodon |
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| dicarboxylic | (adjective) containing two carboxyls per molecule | - |
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| dice | (noun) a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers | Synonyms: die |
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| (verb) play dice | - |
| (verb) cut into cubes | Synonyms: cube |
| dicer | (noun) a mechanical device used for dicing food | - |
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| dicey | (adjective) of uncertain outcome; especially fraught with risk | Synonyms: chanceful, chancy, dodgy |
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| dichloride | (noun) a compound containing two chlorine atoms per molecule | Synonyms: bichloride |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| dichondra | (noun) a creeping perennial herb with hairy stems and orbicular to reniform leaves and small white to greenish flowers; used as a grass substitute in warm regions | Synonyms: Dichondra micrantha |
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| dichotomisation | (noun) the act of dividing into two sharply different categories | Synonyms: dichotomization |
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| dichotomise | (verb) divide into two opposing groups or kinds | Synonyms: dichotomize |
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| dichotomization | (noun) the act of dividing into two sharply different categories | Synonyms: dichotomisation |
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| dichotomize | (verb) divide into two opposing groups or kinds | Synonyms: dichotomise |
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| dichotomous | (adjective) divided or dividing into two sharply distinguished parts or classifications | - |
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| dichotomously | (adverb) in a dichotomous manner | - |
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| dichotomy | (noun) being twofold; a classification into two opposed parts or subclasses | Synonyms: duality |
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| dichroism | (noun) pleochroism of a crystal so that it exhibits two different colors when viewed from two different directions | - |
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| dichromacy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromasy, dichromatism, dichromatopsia, dichromia |
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| dichromasy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromatism, dichromatopsia, dichromia |
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| dichromat | (noun) a person with any of the various forms of dichromacy | - |
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| dichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: bichromate |
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| dichromatic | (adjective) of or relating to dichromatism | - |
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| (adjective) having two colors | Synonyms: bichrome, bicolor, bicolored, bicolour, bicoloured |
| dichromatism | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatopsia, dichromia |
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| dichromatopsia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromia |
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| dichromia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromatopsia |
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| dick | (noun) obscene terms for penis | Synonyms: cock, pecker, prick, putz, shaft, tool |
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| (noun) someone who is a detective | Synonyms: gumshoe, hawkshaw |
| dickens | (noun) a word used in exclamations of confusion | Synonyms: deuce, devil |
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| dicker | (verb) negotiate the terms of an exchange | Synonyms: bargain |
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| dickey | (adjective) (British informal) faulty | Synonyms: dicky |
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| (noun) a man's detachable insert (usually starched) to simulate the front of a shirt | Synonyms: dickie, dicky, shirtfront |
| (noun) a small third seat in the back of an old-fashioned two-seater | Synonyms: dickey-seat, dickie-seat, dickie, dicky-seat, dicky |
| dickeybird | (noun) small bird; adults talking to children sometimes use these words to refer to small birds | Synonyms: dickey-bird, dicky-bird, dickybird |
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| dickhead | (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, bastard, cocksucker, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
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| dickie | (noun) a man's detachable insert (usually starched) to simulate the front of a shirt | Synonyms: dickey, dicky, shirtfront |
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| (noun) a small third seat in the back of an old-fashioned two-seater | Synonyms: dickey-seat, dickey, dickie-seat, dicky-seat, dicky |
| dicky | (adjective) (British informal) faulty | Synonyms: dickey |
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| (noun) a man's detachable insert (usually starched) to simulate the front of a shirt | Synonyms: dickey, dickie, shirtfront |
| (noun) a small third seat in the back of an old-fashioned two-seater | Synonyms: dickey-seat, dickey, dickie-seat, dickie, dicky-seat |
| dickybird | (noun) small bird; adults talking to children sometimes use these words to refer to small birds | Synonyms: dickey-bird, dickeybird, dicky-bird |
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| diclinous | (adjective) having pistils and stamens in separate flowers | - |
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| dicloxacillin | (noun) antibacterial (trade name Dynapen) used to treat staphylococcal infections that are resistant to penicillin | Synonyms: Dynapen |
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| dicot | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicotyledon, exogen, magnoliopsid |
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| dicotyledon | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicot, exogen, magnoliopsid |
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| dicotyledonous | (adjective) (of a flowering plant) having two cotyledons in the seed | - |
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| dicoumarol | (noun) an anticoagulant drug that has now been largely replaced by warfarin | Synonyms: dicumarol |
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| dictate | (noun) a guiding principle | - |
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| (noun) an authoritative rule | - |
| (verb) say out loud for the purpose of recording | - |
| (verb) issue commands or orders for | Synonyms: order, prescribe |
| (verb) rule as a dictator | - |
| dictated | (adjective) determined or decided upon as by an authority | Synonyms: determined, set |
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| dictation | (noun) speech intended for reproduction in writing | - |
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| (noun) an authoritative direction or instruction to do something | Synonyms: bid, bidding, command |
| (noun) matter that has been dictated and transcribed; a dictated passage | - |
| dictator | (noun) a ruler who is unconstrained by law | Synonyms: potentate |
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| (noun) a person who behaves in a tyrannical manner | Synonyms: authoritarian |
| (noun) a speaker who dictates to a secretary or a recording machine | - |
| dictatorial | (adjective) of or characteristic of a dictator | - |
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| (adjective) expecting unquestioning obedience | Synonyms: authoritarian, overbearing |
| (adjective) characteristic of an absolute ruler or absolute rule; having absolute sovereignty | Synonyms: authoritarian, autocratic, despotic, tyrannic, tyrannical |
| dictatorially | (adverb) in an overbearingly domineering manner; as a dictator | Synonyms: autocratically, magisterially |
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| dictatorship | (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: absolutism, authoritarianism, Caesarism, despotism, monocracy, one-man rule, shogunate, Stalinism, totalitarianism, tyranny |
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| diction | (noun) the manner in which something is expressed in words | Synonyms: choice of words, phraseology, phrasing, verbiage, wording |
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| (noun) the articulation of speech regarded from the point of view of its intelligibility to the audience | Synonyms: enunciation |
| dictionary | (noun) a reference book containing an alphabetical list of words with information about them | Synonyms: lexicon |
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| dictostylium | (noun) any slime mold of the genus Dictostylium | - |
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| dictum | (noun) an authoritative declaration | Synonyms: pronouncement, say-so |
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| (noun) an opinion voiced by a judge on a point of law not directly bearing on the case in question and therefore not binding | Synonyms: obiter dictum |
| dictyopteran | (adjective) of or relating to or belonging to the order Dictyoptera | - |
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| dictyosome | (noun) a netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions) | Synonyms: Golgi apparatus, Golgi body, Golgi complex |
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| dicumarol | (noun) an anticoagulant drug that has now been largely replaced by warfarin | Synonyms: dicoumarol |
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| dicynodont | (noun) a kind of therapsid | - |
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| didactic | (adjective) instructive (especially excessively) | Synonyms: didactical |
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| didactical | (adjective) instructive (especially excessively) | Synonyms: didactic |
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| didactically | (adverb) in a didactic manner | Synonyms: pedagogically |
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| didacticism | (noun) communication that is suitable for or intended to be instructive | - |
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| didactics | (noun) the activities of educating or instructing; activities that impart knowledge or skill | Synonyms: education, educational activity, instruction, pedagogy, teaching |
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| didanosine | (noun) an antiviral drug used to combat HIV infection, a reverse transcriptase inhibitor | Synonyms: ddI, DDI, dideoxyinosine |
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| didder | (verb) move with or as if with a tremor | Synonyms: shake |
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| diddle | (verb) manipulate manually or in one's mind or imagination | Synonyms: fiddle, play, toy |
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| (verb) deprive of by deceit | Synonyms: bunco, con, defraud, goldbrick, hornswoggle, mulct, nobble, rook, scam, short-change, swindle, victimize |
| diddley | (noun) a small worthless amount | Synonyms: diddly-shit, diddly-squat, diddly, diddlyshit, diddlysquat, doodly-squat, jack, shit, squat |
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| diddly | (noun) a small worthless amount | Synonyms: diddley, diddly-shit, diddly-squat, diddlyshit, diddlysquat, doodly-squat, jack, shit, squat |
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| diddlyshit | (noun) a small worthless amount | Synonyms: diddley, diddly-shit, diddly-squat, diddly, diddlysquat, doodly-squat, jack, shit, squat |
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| diddlysquat | (noun) a small worthless amount | Synonyms: diddley, diddly-shit, diddly-squat, diddly, diddlyshit, doodly-squat, jack, shit, squat |
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| dideoxycytosine | (noun) an antiviral drug used to combat HIV infection; a nucleoside analog reverse transcriptase inhibitor (NARTI) | Synonyms: ddC, DDC, zalcitabine |
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| dideoxyinosine | (noun) an antiviral drug used to combat HIV infection, a reverse transcriptase inhibitor | Synonyms: ddI, DDI, didanosine |
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| die | (noun) a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers | Synonyms: dice |
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| (noun) a device used for shaping metal | - |
| (noun) a cutting tool that is fitted into a diestock and used for cutting male (external) screw threads on screws or bolts or pipes or rods | - |
| (verb) pass from physical life and lose all bodily attributes and functions necessary to sustain life | Synonyms: buy the farm, cash in one's chips, choke, conk, croak, decease, drop dead, exit, expire, give-up the ghost, go, kick the bucket, pass, pass away, perish, pop off, snuff it |
| (verb) disappear or come to an end | - |
| (verb) suffer spiritual death; be damned (in the religious sense) | - |
| (verb) stop operating or functioning | Synonyms: break, break down, conk out, fail, give out, give way, go, go bad |
| (verb) lose sparkle or bouquet | Synonyms: become flat, pall |
| (verb) to be on base at the end of an inning, of a player | - |
| (verb) cut or shape with a die | Synonyms: die out |
| (verb) be brought to or as if to the point of death by an intense emotion such as embarrassment, amusement, or shame | - |
| (verb) languish as with love or desire | - |
| (verb) feel indifferent towards | - |
| (verb) suffer or face the pain of death | - |
| dieback | (noun) a disease of plants characterized by the gradual dying of the young shoots starting at the tips and progressing to the larger branches | - |
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| diehard | (noun) one who adheres to traditional views | Synonyms: traditionalist |
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| dielectric | (noun) a material such as glass or porcelain with negligible electrical or thermal conductivity | Synonyms: insulator, nonconductor |
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