Of or relating to chemistry. / Of or relating to a material or processes not commonly found in nature or in a particular product. / (obsolete) Of or relating to alchemy.

(chemistry, sciences) Any specific chemical element or chemical compound or alloy. / (colloquial) An artificial chemical compound. / (slang) An addictive drug.

(uncountable) The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules.

(medicine) Any chemical treatment intended to be therapeutic with respect to a disease state.

The branch of soil science that deals with the chemical properties, constituents and reactions within soils.

a voltaic cell consisting of two metal electrodes connected by an electrolyte

(chemistry) The chemistry of the elements (including carbon), and those compounds that do not contain carbon.

(chemistry) The chemistry of organic compounds (that is, chemical compounds with carbon atoms in a covalent bond).

(chemistry) A process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

(chemistry) Any one of the simplest chemical substances that cannot be decomposed in a chemical reaction. Chemical elements consist of atoms which have the same number of protons.