English definition of Chemistry

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Definition of chemistry

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Chemistry (n.) That branch of science which treats of the composition of substances, and of the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry deals with the changes in the composition and constitution of molecules. See Atom, Molecul

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Zoochemical :: Zoochemical (a.) Pertaining to zoochemistry.

Xantho- :: Xantho- () A combining form from Gr. xanqo`s yellow; as in xanthocobaltic salts. Used also adjectively in chemistry.

Neo- :: Neo- () A prefix meaning new, recent, late; and in chemistry designating specifically that variety of metameric hydrocarbons which, when the name was applied, had been recently classified, and in which at least one carbon atom in connected directly with four other carbon atoms; -- contrasted with normal and iso-; as, neopentane; the neoparaffins. Also used adjectively..

Chemistry :: Chemistry (n.) That branch of science which treats of the composition of substances, and of the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry deals with the changes in the composition and constitution of molecules. See Atom, Molecul

Chymistry :: Chymistry () See Chemic, Chemist, Chemistry..

Physiological :: Physiological (a.) Of or pertaining to physiology; relating to the science of the functions of living organism; as, physiological botany or chemistry..

Mechanico-chemical :: Mechanico-chemical (a.) Pertaining to, connected with, or dependent upon, both mechanics and chemistry; -- said especially of those sciences which treat of such phenomena as seem to depend on the laws both of mechanics and chemistry, as electricity and magnetism..

Science :: Science (n.) Any branch or department of systematized knowledge considered as a distinct field of investigation or object of study; as, the science of astronomy, of chemistry, or of mind..

Aqua :: Aqua (n.) Water; -- a word much used in pharmacy and the old chemistry, in various signification, determined by the word or words annexed..

Micro-chemistry :: Micro-chemistry (n.) The application of chemical tests to minute objects or portions of matter, magnified by the use of the microscopy; -- distinguished from macro-chemistry..

Chemical :: Chemical (a.) Pertaining to chemistry; characterized or produced by the forces and operations of chemistry; employed in the processes of chemistry; as, chemical changes; chemical combinations..

Homologue :: Homologue (n.) That which is homologous to something else; as, the corresponding sides, etc., of similar polygons are the homologues of each other; the members or terms of an homologous series in chemistry are the homologues of each other; one of the bones in the hand of man is the homologue of that in the paddle of a whale..

Stereochrome :: Stereo-chemistry (n.) Chemistry considered with reference to the space relations of atoms.

Phyto- :: Phyto- () A combining form from Gr. fyto`n a plant; as, phytochemistry, phytography..

Photochemistry :: Photochemistry (n.) The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography..

Al- :: Al- (A prefix.) The Arabic definite article answering to the English the; as, Alkoran, the Koran or the Book; alchemy, the chemistry..

Alchemy :: Alchemy (n.) An imaginary art which aimed to transmute the baser metals into gold, to find the panacea, or universal remedy for diseases, etc. It led the way to modern chemistry..

Macro-chemistry :: Macro-chemistry (n.) The science which treats of the chemical properties, actions or relations of substances in quantity; -- distinguished from micro-chemistry..

Physicochemical :: Physicochemical (a.) Involving the principles of both physics and chemistry; dependent on, or produced by, the joint action of physical and chemical agencies..

System :: System (n.) An assemblage of objects arranged in regular subordination, or after some distinct method, usually logical or scientific; a complete whole of objects related by some common law, principle, or end; a complete exhibition of essential principles or facts, arranged in a rational dependence or connection; a regular union of principles or parts forming one entire thing; as, a system of philosophy; a system of government; a system of divinity; a system of botany or chemistry; a military sys