| theology | (noun) the learned profession acquired by specialized courses in religion (usually taught at a college or seminary) | - |
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| (noun) a particular system or school of religious beliefs and teachings | Synonyms: theological system |
| (noun) the rational and systematic study of religion and its influences and of the nature of religious truth | Synonyms: divinity |
| theophany | (noun) a visible (but not necessarily material) manifestation of a deity to a human person | - |
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| theophylline | (noun) a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator | Synonyms: Elixophyllin, Slo-Bid, Theobid |
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| theorem | (noun) an idea accepted as a demonstrable truth | - |
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| (noun) a proposition deducible from basic postulates | - |
| theoretician | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoriser, theorist, theorizer |
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| theorisation | (noun) the production or use of theories | Synonyms: theorization |
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| theoriser | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoretician, theorist, theorizer |
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| theorist | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoretician, theoriser, theorizer |
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| theorization | (noun) the production or use of theories | Synonyms: theorisation |
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| theorizer | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoretician, theoriser, theorist |
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| theory | (noun) a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena | - |
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| (noun) a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena | Synonyms: hypothesis, possibility |
| (noun) a belief that can guide behavior | - |
| theosophism | (noun) belief in theosophy | - |
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| theosophist | (noun) a believer in theosophy | - |
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| theosophy | (noun) a system of belief based on mystical insight into the nature of God and the soul | - |
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| theoterrorism | (noun) terrorism for a religious purpose | - |
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| therapeutic | (noun) a medicine or therapy that cures disease or relieve pain | Synonyms: curative, cure, remedy |
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| therapeutics | (noun) branch of medicine concerned with the treatment of disease | - |
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| therapist | (noun) a person skilled in a particular type of therapy | Synonyms: healer |
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| therapsid | (noun) probably warm-blooded; considered direct ancestor of mammals | Synonyms: protomammal |
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| therapy | (noun) (medicine) the act of caring for someone (as by medication or remedial training etc.) | Synonyms: treatment |
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| there | (noun) a location other than here; that place; location, medial pronoun; demonstrative pronoun, location; quantifier: demonstrative determiner, distal; demonstrative pronoun, location; quantifier: demonstrative determiner, singular, distal | - |
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| theremin | (noun) an electronic musical instrument; melodies can be played by moving the right hand between two rods that serve as antennas to control pitch; the left hand controls phrasing | - |
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| thereness | (noun) the state of being there--not here--in position | - |
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| (noun) real existence | - |
| theridiid | (noun) spider having a comb-like row of bristles on each hind foot | Synonyms: comb-footed spider |
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| therm | (noun) a unit of heat equal to 100,000 British thermal units | - |
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| thermal | (noun) rising current of warm air | - |
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| thermalgesia | (noun) pain caused by heat | - |
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| thermel | (noun) a thermometer that uses thermoelectric current to measure temperature | Synonyms: electric thermometer, thermoelectric thermometer |
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| thermion | (noun) an electrically charged particle (electron or ion) emitted by a substance at a high temperature | - |
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| thermionics | (noun) the branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes) | - |
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| thermistor | (noun) a semiconductor device made of materials whose resistance varies as a function of temperature; can be used to compensate for temperature variation in other components of a circuit | Synonyms: thermal resistor |
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| thermoacidophile | (noun) archaebacteria that thrive in strongly acidic environments at high temperatures | - |
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| thermocautery | (noun) cautery (destruction of tissue) by heat | - |
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| thermochemistry | (noun) the branch of chemistry that studies the relation between chemical action and the amount of heat absorbed or generated | - |
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| thermocoagulation | (noun) congealing tissue by heat (as by electric current) | - |
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| thermocompressor | (noun) An injector, ejector, steam ejector, steam injector, eductor-jet pump or thermocompressor is a type of pump. | Synonyms: eductor-jet pump, ejector, injector, steam ejector, steam injector |
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| thermocouple | (noun) a kind of thermometer consisting of two wires of different metals that are joined at both ends; one junction is at the temperature to be measured and the other is held at a fixed lower temperature; the current generated in the circuit is proportional to the temperature difference | Synonyms: thermocouple junction |
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| thermodynamics | (noun) the branch of physics concerned with the conversion of different forms of energy | - |
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| thermoelectricity | (noun) electricity produced by heat (as in a thermocouple) | - |
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| thermogram | (noun) a graphical record produced by a thermograph | - |
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| thermograph | (noun) a thermometer that records temperature variations on a graph as a function of time | Synonyms: thermometrograph |
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| (noun) medical instrument that uses an infrared camera to reveal temperature variations on the surface of the body | - |
| thermography | (noun) diagnostic technique using a thermograph to record the heat produced by different parts of the body; used to study blood flow and to detect tumors | - |
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| thermogravimeter | (noun) a hydrometer that includes a thermometer | Synonyms: thermohydrometer |
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| thermogravimetry | (noun) the measurement of changes in weight as a function of changes in temperature used as a technique of chemically analyzing substances | - |
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| thermohydrometer | (noun) a hydrometer that includes a thermometer | Synonyms: thermogravimeter |
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| thermojunction | (noun) a junction between two dissimilar metals across which a voltage appears | - |
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| thermometer | (noun) measuring instrument for measuring temperature | - |
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| thermometrograph | (noun) a thermometer that records temperature variations on a graph as a function of time | Synonyms: thermograph |
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| thermometry | (noun) the measurement of temperature | - |
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| thermopile | (noun) a kind of thermometer for measuring heat radiation; consists of several thermocouple junctions in series | - |
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| thermoplastic | (noun) a material that softens when heated and hardens again when cooled | Synonyms: thermoplastic resin |
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| thermoreceptor | (noun) a sensory receptor that responds to heat and cold | - |
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| thermoregulator | (noun) a regulator for automatically regulating temperature by starting or stopping the supply of heat | Synonyms: thermostat |
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| thermos | (noun) vacuum flask that preserves temperature of hot or cold drinks | Synonyms: thermos bottle, thermos flask |
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| thermosphere | (noun) the atmospheric layer between the mesosphere and the exosphere | - |
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| thermostat | (noun) a regulator for automatically regulating temperature by starting or stopping the supply of heat | Synonyms: thermoregulator |
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| thermostatics | (noun) the aspect of thermodynamics concerned with thermal equilibrium | Synonyms: thermodynamics of equilibrium |
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| thermotherapy | (noun) the use of heat to treat a disease or disorder; heating pads or hot compresses or hot-water bottles are used to promote circulation in peripheral vascular disease or to relax tense muscles | - |
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| thermotropism | (noun) an orienting response to warmth | - |
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| theropod | (noun) any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs | Synonyms: bird-footed dinosaur, theropod dinosaur |
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| thesaurus | (noun) a book containing a classified list of synonyms | Synonyms: synonym finder |
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| thesis | (noun) an unproved statement put forward as a premise in an argument | - |
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| (noun) a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree | Synonyms: dissertation |
| thespian | (noun) a theatrical performer | Synonyms: actor, histrion, player, role player |
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| theta | (noun) the 8th letter of the Greek alphabet | - |
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| theurgy | (noun) white magic performed with the help of beneficent spirits (as formerly practiced by Neoplatonists) | - |
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| (noun) the effect of supernatural or divine intervention in human affairs | - |
| thiabendazole | (noun) an antifungal agent and anthelmintic | - |
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| thiamin | (noun) a B vitamin that prevents beriberi; maintains appetite and growth | Synonyms: aneurin, antiberiberi factor, thiamine, vitamin B1 |
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| thiamine | (noun) a B vitamin that prevents beriberi; maintains appetite and growth | Synonyms: aneurin, antiberiberi factor, thiamin, vitamin B1 |
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| thiazide | (noun) any of a group of drugs commonly used as diuretics in the treatment of hypertension; they block the reabsorption of sodium in the kidneys | - |
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| thiazine | (noun) a compound made up of a ring of four carbon atoms and one sulfur atom and one nitrogen atom | - |
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| thick | (noun) the location of something surrounded by other things | Synonyms: midst |
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| thickener | (noun) any material used to thicken | Synonyms: thickening |
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| thickening | (noun) the act of thickening | Synonyms: inspissation |
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| (noun) any thickened enlargement | Synonyms: knob, node |
| (noun) any material used to thicken | Synonyms: thickener |
| thicket | (noun) a dense growth of bushes | Synonyms: brush, brushwood, coppice, copse |
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| thickhead | (noun) Australian and southeastern Asian birds with a melodious whistling call | Synonyms: whistler |
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| thickness | (noun) the dimension through an object as opposed to its length or width | - |
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| (noun) resistance to flow | - |
| (noun) used of a line or mark | Synonyms: heaviness |
| (noun) indistinct articulation | - |
| thief | (noun) a criminal who takes property belonging to someone else with the intention of keeping it or selling it | Synonyms: stealer |
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| thievery | (noun) the act of taking something from someone unlawfully | Synonyms: larceny, stealing, theft, thieving |
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| thieving | (noun) the act of taking something from someone unlawfully | Synonyms: larceny, stealing, theft, thievery |
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| thievishness | (noun) having a disposition to steal | Synonyms: larcenous |
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| thigh | (noun) the part of the leg between the hip and the knee | - |
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| (noun) the upper joint of the leg of a fowl | Synonyms: second joint |
| thighbone | (noun) the longest and thickest bone of the human skeleton; extends from the pelvis to the knee | Synonyms: femoris, femur |
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| thill | (noun) one of two shafts extending from the body of a cart or carriage on either side of the animal that pulls it | - |
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| thimble | (noun) a small metal cap to protect the finger while sewing; can be used as a small container | - |
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| (noun) as much as a thimble will hold | Synonyms: thimbleful |
| thimbleberry | (noun) raspberry native to eastern North America having black thimble-shaped fruit | Synonyms: black raspberry, blackcap, blackcap raspberry, Rubus occidentalis |
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| (noun) white-flowered raspberry of western North America and northern Mexico with thimble-shaped orange berries | Synonyms: Rubus parviflorus, salmon berry, salmonberry |
| (noun) shrubby raspberry of eastern North America having showy rose to purplish flowers and red or orange thimble-shaped fruit | Synonyms: flowering raspberry, purple-flowering raspberry, Rubus odoratus |
| thimbleful | (noun) as much as a thimble will hold | Synonyms: thimble |
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| thimblerig | (noun) a swindling sleight-of-hand game; victim guesses which of three things a pellet is under | Synonyms: shell game |
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| thimbleweed | (noun) a common North American anemone with cylindrical fruit clusters resembling thimbles | Synonyms: Anemone cylindrica |
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| thimerosal | (noun) a light-colored crystalline powder (trade name Merthiolate) used as a surgical antiseptic | Synonyms: Merthiolate, sodium ethylmercurithiosalicylate |
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| thing | (noun) a separate and self-contained entity | - |
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| (noun) an action | - |
| (noun) an artifact | - |
| (noun) an entity that is not named specifically | - |
| (noun) any attribute or quality considered as having its own existence | - |
| (noun) a special abstraction | - |
| (noun) a special objective | - |
| (noun) a vaguely specified concern | Synonyms: affair, matter |
| (noun) a statement regarded as an object | - |
| (noun) an event | - |
| (noun) a persistent illogical feeling of desire or aversion | - |
| (noun) a special situation | - |
| thingamabob | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| thingamajig | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| thingmabob | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| thingmajig | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| things | (noun) any movable possession (especially articles of clothing) | - |
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| thingumabob | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| thingumajig | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| thingummy | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, whatchamacallit, whatchamacallum, whatsis, widget |
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| think | (noun) an instance of deliberate thinking | - |
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| thinker | (noun) an important intellectual | Synonyms: creative thinker, mind |
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| (noun) someone who exercises the mind (usually in an effort to reach a decision) | - |