Definition of theory

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Theory (n.) The philosophical explanation of phenomena, either physical or moral; as, Lavoisier's theory of combustion; Adam Smith's theory of moral sentiments..

Lern More About Theory

Evolutionism :: Evolutionism (n.) The theory of, or belief in, evolution. See Evolution, 6 and 7..
Rationalist :: Rationalist (n.) One who accepts rationalism as a theory or system; also, disparagingly, a false reasoner. See Citation under Reasonist..
Theorist :: Theorist (n.) One who forms theories; one given to theory and speculation; a speculatist.
#NAME? :: -ism () A suffix indicating an act, a process, the result of an act or a process, a state; also, a characteristic (as a theory, doctrine, idiom, etc.); as, baptism, galvanism, organism, hypnotism, socialism, sensualism, Anglicism..
Homeopathy :: Homeopathy (n.) The art of curing, founded on resemblances; the theory and its practice that disease is cured (tuto, cito, et jucunde) by remedies which produce on a healthy person effects similar to the symptoms of the complaint under which the patient suffers, the remedies being usually administered in minute doses. This system was founded by Dr. Samuel Hahnemann, and is opposed to allopathy, or heteropathy..
Vulcanic :: Vulcanic (a.) Of or pertaining to volcanoes; specifically, relating to the geological theory of the Vulcanists, or Plutonists..
Ray :: Ray (n.) Sight; perception; vision; -- from an old theory of vision, that sight was something which proceeded from the eye to the object seen..
Subaud :: Subatom (n.) A hypothetical component of a chemical atom, on the theory that the elements themselves are complex substances; -- called also atomicule..
Biogenist :: Biogenist (n.) A believer in the theory of biogenesis.
Vitalistic :: Vitalistic (a.) Pertaining to, or involving, vitalism, or the theory of a special vital principle..
Theory :: Theory (n.) A doctrine, or scheme of things, which terminates in speculation or contemplation, without a view to practice; hypothesis; speculation..
Theoretical :: Theoretical (a.) Pertaining to theory; depending on, or confined to, theory or speculation; speculative; terminating in theory or speculation: not practical; as, theoretical learning; theoretic sciences..
Kantism :: Kantism (n.) The doctrine or theory of Kant; the Kantian philosophy.
Cerebralism :: Cerebralism (n.) The doctrine or theory that psychical phenomena are functions or products of the brain only.
Transmutation :: Transmutation (n.) The change of one species into another, which is assumed to take place in any development theory of life; transformism..
Antiphlogistian :: Antiphlogistian (n.) An opposer of the theory of phlogiston.
Pleomorphism :: Pleomorphism (n.) The theory that the various genera of bacteria are phases or variations of growth of a number of Protean species, each of which may exhibit, according to undetermined conditions, all or some of the forms characteristic of the different genera and species..
Physicist :: Physicist (n.) A believer in the theory that the fundamental phenomena of life are to be explained upon purely chemical and physical principles; -- opposed to vitalist.
Phenomenist :: Phenomenist (n.) One who believes in the theory of phenomenalism.
Preformation :: Preformation (n.) An old theory of the preexistence of germs. Cf. Embo/tement.
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