theophrastus
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～ Greek philosopher who was a student of Aristotle and who succeeded Aristotle as the leader of the Peripatetics (371-287 BC)
theophylline
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～ a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator
theorem
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～ an idea accepted as a demonstrable truth
theorem
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～ a proposition deducible from basic postulates
theoretical account
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～ a hypothetical description of a complex entity or process; "the computer program was based on a model of the circulatory and respiratory systems"
theoretician
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～ someone who theorizes (especially in science or art)
theorisation
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～ the production or use of theories
theoriser
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～ someone who theorizes (especially in science or art)
theorist
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～ someone who theorizes (especially in science or art)
theorization
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～ the production or use of theories
theorizer
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～ someone who theorizes (especially in science or art)
theory of relativity
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～ (physics) the theory that space and time are relative concepts rather than absolute concepts
theory of inheritance
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～ (biology) a theory of how characteristics of one generation are derived from earlier generations
theory of gravitation
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～ (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 them
theory of punctuated equilibrium
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～ a theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change
theory of electrolytic dissociation
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～ (chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions); the product of an acid and a base is a salt and water
theory
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～ 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; "theories can incorporate facts and laws and tested hypotheses"; "true in fact and theory"
theory of evolution
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～ (biology) a scientific theory of the origin of species of plants and animals
theory of games
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～ (economics) a theory of competition stated in terms of gains and losses among opposing players
theory
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～ a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena; "a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"