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Quaternary Definition


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Other Quaternary Definition

[n] the cardinal number that is the sum of three and one
[n] last 2 million years
[adj] 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"
[adj] consisting of or especially arranged in sets of four; "quaternate leaves"; "a quaternary compound"

Misc. Definitions

\Qua*ter"na*ry\, a. [L. quaternarius consisting of four each, containing four, fr. quaterni four each, fr. quattuor four: cf. F. quaternaire. See {Four}.]
1. Consisting of four; by fours, or in sets of four.
2. (Geol.) Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.
\Qua*ter"na*ry\, n. [L. numerus quaternarius: cf. F. quaternaire.]
1. The number four. --Boyle.
2. (Geol.) The Quaternary age, era, or formation. See the Chart of {Geology}.

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