| ternion | (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, terzetto, three, threesome, tierce, trey, triad, trine, trinity, trio, triplet, troika |
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| terpene | (noun) an unsaturated hydrocarbon obtained from plants | - |
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| terpinene | (noun) any of a group of isomeric hydrocarbons that are classified as terpenes. | - |
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| terpsichore | (noun) taking a series of rhythmical steps (and movements) in time to music | Synonyms: dance, dancing, saltation |
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| terpsichorean | (noun) a performer who dances professionally | Synonyms: dancer, professional dancer |
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| terrace | (noun) usually paved outdoor area adjoining a residence | Synonyms: patio |
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| (noun) a row of houses built in a similar style and having common dividing walls (or the street on which they face) | - |
| (noun) a level shelf of land interrupting a declivity (with steep slopes above and below) | Synonyms: bench |
| terracotta | (noun) a hard unglazed brownish-red earthenware | Synonyms: terra cotta |
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| terrain | (noun) a piece of ground having specific characteristics or military potential | - |
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| terrapin | (noun) any of various edible North American web-footed turtles living in fresh or brackish water | - |
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| terrarium | (noun) a vivarium in which selected living plants are kept and observed | - |
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| terreplein | (noun) level space where heavy guns can be mounted behind the parapet at the top of a rampart | - |
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| terribleness | (noun) a quality of extreme unpleasantness | Synonyms: awfulness, dreadfulness, horridness |
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| terrier | (noun) any of several usually small short-bodied breeds originally trained to hunt animals living underground | - |
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| terrine | (noun) a pate or fancy meatloaf baked in an earthenware casserole | - |
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| territorial | (noun) a territorial military unit | Synonyms: territorial reserve |
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| (noun) nonprofessional soldier member of a territorial military unit | - |
| territorialisation | (noun) the act of organizing as a territory | Synonyms: territorialization |
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| territoriality | (noun) the behavior of a male animal that defines and defends its territory | - |
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| territorialization | (noun) the act of organizing as a territory | Synonyms: territorialisation |
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| territory | (noun) an area of knowledge or interest | - |
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| (noun) a region marked off for administrative or other purposes | Synonyms: district, dominion, territorial dominion |
| (noun) the geographical area under the jurisdiction of a sovereign state | Synonyms: soil |
| terror | (noun) the use of extreme fear in order to coerce people (especially for political reasons) | - |
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| (noun) an overwhelming feeling of fear and anxiety | Synonyms: affright, panic |
| (noun) a very troublesome child | Synonyms: brat, holy terror, little terror |
| (noun) a person who inspires fear or dread | Synonyms: scourge, threat |
| terrorisation | (noun) the act of inspiring with fear | Synonyms: frightening, terrorization |
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| (noun) an act of terrorism | Synonyms: terrorization |
| terrorism | (noun) the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear | Synonyms: act of terrorism, terrorist act |
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| terrorist | (noun) a radical who employs terror as a political weapon; usually organizes with other terrorists in small cells; often uses religion as a cover for terrorist activities | - |
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| terrorization | (noun) the act of inspiring with fear | Synonyms: frightening, terrorisation |
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| (noun) an act of terrorism | Synonyms: terrorisation |
| terry | (noun) a pile fabric (usually cotton) with uncut loops on both sides; used to make bath towels and bath robes | Synonyms: terry cloth, terrycloth |
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| terrycloth | (noun) a pile fabric (usually cotton) with uncut loops on both sides; used to make bath towels and bath robes | Synonyms: terry, terry cloth |
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| terseness | (noun) a neatly short and concise expressive style | - |
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| tertigravida | (noun) a woman who is pregnant for the third time | Synonyms: gravida III |
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| terzetto | (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, three, threesome, tierce, trey, triad, trine, trinity, trio, triplet, troika |
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| tesla | (noun) a unit of magnetic flux density equal to one weber per square meter | - |
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| tessella | (noun) a small tessera | - |
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| tessellation | (noun) the act of adorning with mosaic | - |
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| (noun) the careful juxtaposition of shapes in a pattern | - |
| tessera | (noun) a small square tile of stone or glass used in making mosaics | - |
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| tesseract | (noun) the four-dimensional analogue of a cube | - |
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| test | (noun) the act of testing something | Synonyms: run, trial |
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| (noun) any standardized procedure for measuring sensitivity or memory or intelligence or aptitude or personality etc | Synonyms: mental test, mental testing, psychometric test |
| (noun) the act of undergoing testing | Synonyms: trial |
| (noun) a hard outer covering as of some amoebas and sea urchins | - |
| (noun) trying something to find out about it | Synonyms: trial, trial run, tryout |
| (noun) a set of questions or exercises evaluating skill or knowledge | Synonyms: exam, examination |
| testa | (noun) protective outer layer of seeds of flowering plants | Synonyms: episperm, seed coat |
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| testacean | (noun) any of various rhizopods of the order Testacea characterized by having a shell | - |
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| testament | (noun) a profession of belief | - |
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| (noun) a legal document declaring a person's wishes regarding the disposal of their property when they die | Synonyms: will |
| (noun) strong evidence for something | - |
| testate | (noun) a person who makes a will | Synonyms: testator |
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| testator | (noun) a person who makes a will | Synonyms: testate |
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| testatrix | (noun) a female testator | - |
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| testcross | (noun) a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring | Synonyms: test-cross |
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| testee | (noun) someone who is tested (as by an intelligence test or an academic examination) | Synonyms: examinee |
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| tester | (noun) a flat canopy (especially one over a four-poster bed) | - |
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| (noun) someone who administers a test to determine your qualifications | Synonyms: examiner, quizzer |
| testicle | (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, ballock, bollock, egg, nut, orchis, testis |
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| testiere | (noun) medieval plate armor to protect a horse's head | Synonyms: chamfron, chanfron, front-stall, frontstall |
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| testifier | (noun) a person who testifies or gives a deposition | Synonyms: deponent, deposer |
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| testimonial | (noun) something that recommends (or expresses commendation of) a person or thing as worthy or desirable | Synonyms: good word, recommendation |
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| (noun) something given or done as an expression of esteem | Synonyms: tribute |
| (noun) something that serves as evidence | Synonyms: testimony |
| testimony | (noun) a solemn statement made under oath | - |
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| (noun) an assertion offering firsthand authentication of a fact | - |
| (noun) something that serves as evidence | Synonyms: testimonial |
| testiness | (noun) feeling easily irritated | Synonyms: tetchiness, touchiness |
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| testing | (noun) the act of subjecting to experimental test in order to determine how well something works | - |
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| (noun) the act of giving students or candidates a test (as by questions) to determine what they know or have learned | Synonyms: examination |
| (noun) an examination of the characteristics of something | - |
| testis | (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, ballock, bollock, egg, nut, orchis, testicle |
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| testosterone | (noun) a potent androgenic hormone produced chiefly by the testes; responsible for the development of male secondary sex characteristics | - |
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| testudo | (noun) a movable protective covering that provided protection from above; used by Roman troops when approaching the walls of a besieged fortification | - |
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| tetanilla | (noun) clinical neurological syndrome characterized by muscular twitching and cramps and (when severe) seizures; associated with calcium deficiency (hypoparathyroidism) or vitamin D deficiency or alkalosis | Synonyms: apyretic tetanus, intermittent cramp, intermittent tetanus, tetany |
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| tetanus | (noun) a sustained muscular contraction resulting from a rapid series of nerve impulses | - |
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| (noun) an acute and serious infection of the central nervous system caused by bacterial infection of open wounds; spasms of the jaw and laryngeal muscles may occur during the late stages | Synonyms: lockjaw |
| tetany | (noun) clinical neurological syndrome characterized by muscular twitching and cramps and (when severe) seizures; associated with calcium deficiency (hypoparathyroidism) or vitamin D deficiency or alkalosis | Synonyms: apyretic tetanus, intermittent cramp, intermittent tetanus, tetanilla |
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| tetartanopia | (noun) a form of dichromacy characterized by lowered sensitivity to yellow light; so rare that its existence has been questioned | Synonyms: yellow-blindness |
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| tetchiness | (noun) feeling easily irritated | Synonyms: testiness, touchiness |
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| teth | (noun) the 9th letter of the Hebrew alphabet | - |
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| tether | (noun) restraint consisting of a rope (or light chain) used to restrain an animal | Synonyms: lead, leash |
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| tetherball | (noun) a game with two players who use rackets to strike a ball that is tethered to the top of a pole; the object is to wrap the string around the pole | - |
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| tetra | (noun) brightly colored tropical freshwater fishes | - |
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| tetracaine | (noun) a crystalline compound used in the form of a hydrochloride as a local anesthetic | - |
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| tetrachlorethylene | (noun) anthelmintic agent used against hookworm and other nematodes | Synonyms: carbon dichloride, ethylene tetrachloride, tetrachloroethylene |
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| tetrachloride | (noun) any compound that contains four chlorine atoms per molecule | - |
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| tetrachloroethylene | (noun) anthelmintic agent used against hookworm and other nematodes | Synonyms: carbon dichloride, ethylene tetrachloride, tetrachlorethylene |
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| tetrachloromethane | (noun) a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined | Synonyms: carbon tet, carbon tetrachloride, perchloromethane |
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| tetracycline | (noun) an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections | Synonyms: Achromycin |
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| tetrad | (noun) the cardinal number that is the sum of three and one | Synonyms: 4, four, foursome, IV, Little Joe, quadruplet, quartet, quatern, quaternary, quaternion, quaternity |
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| tetrafluoroethylene | (noun) a flammable gaseous fluorocarbon used in making plastics (polytetrafluoroethylene resins) | - |
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| tetragen | (noun) any chemical element that belongs to the carbon group. | Synonyms: carbon group element, crystallogen, Group 14 element, tetrel |
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| tetragon | (noun) a four-sided polygon | Synonyms: quadrangle, quadrilateral |
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| tetragram | (noun) a word that is written with four letters in an alphabetic writing system | - |
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| tetrahalide | (noun) any halide containing four halogen atoms in its molecules | - |
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| tetrahedron | (noun) any polyhedron having four plane faces | - |
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| tetrahydrocannabinol | (noun) psychoactive substance present in marijuana | Synonyms: THC |
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| tetrahymena | (noun) relative of the paramecium; often used in genetics research | - |
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| tetraiodothyronine | (noun) hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells | Synonyms: T, thyroxin, thyroxine |
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| tetralogy | (noun) a series of four related works (plays or operas or novels) | - |
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| tetrameter | (noun) a verse line having four metrical feet | - |
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| tetramethyldiarsine | (noun) a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air | Synonyms: cacodyl |
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| tetranychid | (noun) web-spinning mite that attacks garden plants and fruit trees | Synonyms: spider mite |
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| tetrapod | (noun) a vertebrate animal having four feet or legs or leglike appendages | - |
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| tetrasaccharide | (noun) any of a variety of carbohydrates that yield four monosaccharide molecules on complete hydrolysis | - |
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| tetraskele | (noun) a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center | Synonyms: tetraskelion |
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| tetraskelion | (noun) a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center | Synonyms: tetraskele |
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| tetrasporangium | (noun) a sporangium containing four asexual spores | - |
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| tetraspore | (noun) one of the four asexual spores produced within a sporangium | - |
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| tetrel | (noun) any chemical element that belongs to the carbon group. | Synonyms: carbon group element, crystallogen, Group 14 element, tetragen |
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| tetri | (noun) 100 tetri equal 1 lari in Georgia | - |
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| tetrode | (noun) a thermionic tube having four electrodes | - |
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| tetrodotoxin | (noun) a powerful neurotoxin found in the ovaries of pufferfish | - |
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| tetrose | (noun) any monosaccharide sugar containing four atoms of carbon per molecule | - |
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| tetroxide | (noun) an oxide containing four atoms of oxygen in the molecule | - |
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| tetryl | (noun) a yellow crystalline explosive solid that is used in detonators | Synonyms: nitramine |
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| tetterwort | (noun) perennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic properties; rootstock used as a stimulant and expectorant | Synonyms: bloodroot, puccoon, redroot, Sanguinaria canadensis |
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| tettigoniid | (noun) grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male | Synonyms: long-horned grasshopper |
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| text | (noun) the words of something written | Synonyms: textual matter |
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| (noun) the main body of a written work (as distinct from illustrations or footnotes etc.) | - |
| (noun) a book prepared for use in schools or colleges | Synonyms: school text, schoolbook, text edition, textbook |
| (noun) a passage from the Bible that is used as the subject of a sermon | - |
| textbook | (noun) a book prepared for use in schools or colleges | Synonyms: school text, schoolbook, text, text edition |
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