Glossary · Nouns · T
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TermTypeDefinitionClassificationsUpdated
Theory of DissociationnounMWE(chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions)verified
Theory of Electrolytic DissociationnounMWE(chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions)verified
Theory of EvolutionnounMWE(biology) a scientific theory of the origin of species of plants and animalsverified
Theory of GamesnounMWE(economics) a theory of competition stated in terms of gains and losses among opposing playersverified
Theory of GravitationnounMWE(physics) the theory that any two particles of matter attract one another with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between themverified
Theory of GravitynounMWE(physics) the theory that any two particles of matter attract one another with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between themverified
Theory of IndicatorsnounMWE(chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociationverified
Theory of InheritancenounMWE(biology) a theory of how characteristics of one generation are derived from earlier generationsverified
Theory of PreformationnounMWEa theory (popular in the 18th century and now discredited) that an individual develops by simple enlargement of a tiny fully formed organism (a homunculus) that exists in the germ cellverified
Theory of Punctuated EquilibriumnounMWEa theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow changeverified
Theory of RelativitynounMWE(physics) the theory that space and time are relative concepts rather than absolute conceptsverified
Theosophynouna system of belief based on mystical insight into the nature of God and the soulverified
Therapeutic AbortionnounMWEa legally induced abortion for medical reasons (as when the mother's life is threatened)verified
Therapeutic CloningnounMWEnuclear transplantation of a patient's own cells to make an oocyte from which immune-compatible cells (especially stem cells) can be derived for transplantverified
Therapynoun(medicine) the act of caring for someone (as by medication or remedial training etc.)verified
Thermal EquilibriumnounMWEa state in which all parts of a system are at the same temperatureverified
Thermal PollutionnounMWEharm to lakes and rivers resulting from the release of excessive waste heat into themverified
Thermal PrinternounMWEa printer that produces characters by applying heat to special paper that is sensitive to heatverified
Thermal ReactornounMWEa nuclear reactor in which nuclear fissions are caused by neutrons that are slowed down by a moderatorverified
Thermal ResistornounMWEa semiconductor device made of materials whose resistance varies as a function of temperatureverified
Thermionnounan electrically charged particle, either electron or ion, emitted by a substance at a high temperatureverified
Thermionic CurrentnounMWEan electric current produced between two electrodes as a result of electrons emitted by thermionic emissionverified
Thermionic TubenounMWEelectronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelopeverified
Thermionic ValvenounMWEelectronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelopeverified
Thermionicsnounthe branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes)verified
Thermistornouna semiconductor device made of materials whose resistance varies as a function of temperatureverified
Thermoacidophilenounarchaebacteria that thrive in strongly acidic environments at high temperaturesverified
Thermochemistrynounthe branch of chemistry that studies the relation between chemical action and the amount of heat absorbed or generatedverified
Thermocouplenouna kind of thermometer consisting of two wires of different metals that are joined at both endsverified
Thermocouple JunctionnounMWEa kind of thermometer consisting of two wires of different metals that are joined at both endsverified
Thermodynamicsnounthe branch of physics concerned with the conversion of different forms of energyverified
Thermodynamics of EquilibriumnounMWEthe aspect of thermodynamics concerned with thermal equilibriumverified
Thermoelectric ThermometernounMWEa thermometer that uses thermoelectric current to measure temperatureverified
Thermographnounmedical instrument that uses an infrared camera to reveal temperature variations on the surface of the bodyverified
Thermographynoundiagnostic technique using a thermograph to record the heat produced by different parts of the bodyverified
Thermogravimetrynounthe measurement of changes in weight as a function of changes in temperature used as a technique of chemically analyzing substancesverified
Thermometrographnouna thermometer that records temperature variations on a graph as a function of timeverified
Thermonuclear BombnounMWEa nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form heliumverified
Thermonuclear ReactornounMWEa nuclear reactor that uses controlled nuclear fusion to generate energyverified
Thermoregulatornouna regulator for automatically regulating temperature by starting or stopping the supply of heatverified
Theropodnounany of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legsverified
Theropod DinosaurnounMWEany of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legsverified
Theta RhythmnounMWEthe normal brainwave in the encephalogram of a person who is awake but relaxed and drowsyverified
Theta WavenounMWEthe normal brainwave in the encephalogram of a person who is awake but relaxed and drowsyverified
Theurgynounwhite magic performed with the help of beneficent spirits (as formerly practiced by Neoplatonists)verified
Thiazidenounany of a group of drugs commonly used as diuretics in the treatment of hypertensionverified