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quaternary
From The Collaborative International Dictionary of English v.0.48:
Quaternary \Qua*ter"na*ry\, n. [L. numerus quaternarius: cf. F.
quaternaire.]
1. The number four. --Boyle.
[1913 Webster]
2. (Geol.) The Quaternary age, era, or formation. See the
Chart of Geology.
[1913 Webster]
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From The Collaborative International Dictionary of English v.0.48:
Quaternary \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.] [1913 Webster] 1. Consisting of four; by fours, or in sets of four. [1913 Webster] 2. (Geol.) Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man. [1913 Webster]
