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ed by the forces and operations of chemistry; employed in the processes of chemistry; as, chemical changes; chemical comnbinations. Chemical attraction or affinity. See under Attraction.

According to chemical principles; by chemical process or operation.

Of or relating to alchemy.

In the manner of alchemy.

Of or pertaining to electro-chemistry. Ure.

Of or pertaining to iatrochemistry, or to the iatrochemists.

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.

Of or pertaining to micro-chemistry; as, a micro-chemical test.

Of or pertaining to chemical action of light, or produced by it; as, the photochemical changes of the visual purple of the retina.

oth physics and chemistry; dependent on, or produced by, the joint action of physical and chemical agencies. Huxley.

Relating to phytochemistry. R. Hunt.

Pertaining to, or illustrating, the hypothetical space relations of atoms in the molecule; as, a stereo-chemic formula.

Above or beyond chemistry; inexplicable by chemical laws. J. Le Conte.

Of or pertaining to thermochemistry; obtained by, or employed in, thermochemistry.

Pertaining to zoöchemistry.

To take up by cohesive, chemical, or any molecular action, as when charcoal absorbs gases. So heat, light, and electricity are absorbed or taken up in the substances into which they pass. Nichol. p. 8

An imbibing or reception by molecular or chemical action; as, the absorption of light, heat, electricity, etc.

separate, as the more volatile or soluble parts of a substance, by distillation or other chemical processes. In this sense extract is now more generally used.

The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required. -- Ac`id*i*met"ric*al, a.

The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.