Associations to the word «Quaternary»

QUATERNARY, adjective. (proscribed) Of fourth rank or order.

QUATERNARY, adjective. Of a mathematical expression containing e.g. x4.

QUATERNARY, proper noun. (geology) The geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs.

QUATERNARY AMMONIUM, noun. (chemistry) An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group

QUATERNARY AMMONIUM COMPOUND, noun. (chemistry) An amine derivative, containing four radicals, of general formula R1R2R3R4-N+X-; the radicals may be the same, different, or part of a ring; X is any univalent anion such as OH-.

QUATERNARY AMMONIUM COMPOUNDS, noun. Plural of quaternary ammonium compound

QUATERNARY INDUSTRY, noun. The sector of industry that involves the intellectual services: research, development, and information. It is considered the fourth basic industry.

QUATERNARY STRUCTURE, noun. (biochemistry) (molecular biology) The arrangement of multiple folded or coiled proteins to form a multi-subunit complex

QUATERNARY, noun. Last 2 million years.

QUATERNARY, noun. The cardinal number that is the sum of three and one.

QUATERNARY, adjective. Consisting of or especially arranged in sets of four; "quaternate leaves"; "a quaternary compound".

QUATERNARY, adjective. Coming next after the third and just before the fifth in position or time or degree or magnitude; "the quaternary period of geologic time extends from the end of the tertiary period to the present".