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

Butter :: Butter (n.) Any substance resembling butter in degree of consistence, or other qualities, especially, in old chemistry, the chlorides, as butter of antimony, sesquichloride of antimony; also, certain concrete fat oils remaining nearly solid at ordinary temperatures, as butter of cacao, vegetable butter, shea butter..

Phytochimy :: Phytochimy (n.) Phytochemistry.

Chemistry :: Chemistry (n.) An application of chemical theory and method to the consideration of some particular subject; as, the chemistry of iron; the chemistry of indigo..

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

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

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..

Zoochemistry :: Zoochemistry (n.) Animal chemistry; particularly, the description of the chemical compounds entering into the composition of the animal body, in distinction from biochemistry..

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

Iatrochemical :: Iatrochemical (a.) Of or pertaining to iatrochemistry, or to the iatrochemists..

Terminology :: Terminology (n.) The terms actually used in any business, art, science, or the like; nomenclature; technical terms; as, the terminology of chemistry..

Phytochemistry :: Phytochemistry (n.) Chemistry in its relation to vegetable bodies; vegetable chemistry.

Trial :: Trial (n.) Examination by a test; experiment, as in chemistry, metallurgy, etc..

Thermochemistry :: Thermochemistry (n.) That branch of chemical science which includes the investigation of the various relations existing between chemical action and that manifestation of force termed heat, or the determination of the heat evolved by, or employed in, chemical actions..

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

Actino-chemistry :: Actino-chemistry (n.) Chemistry in its relations to actinism.

-ate :: -ate () In chemistry it is used to denote the salts formed from those acids whose names end -ic (excepting binary or halogen acids); as, sulphate from sulphuric acid, nitrate from nitric acid, etc. It is also used in the case of certain basic salts..

Magistery :: Magistery (n.) A precipitate; a fine substance deposited by precipitation; -- applied in old chemistry to certain white precipitates from metallic solutions; as, magistery of bismuth..

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