quaternary
quaternary: adj. & n. --adj.
1 having four parts.
2 (Quaternary) Geol. of or relating to the most recent period in the Cenozoic era with evidence of many species of present-day plants and animals (cf. PLEISTOCENE, HOLOCENE). Cf. Appendix II. --n. (pl. -ies) 1 a set of four things.
2 (Quaternary) Geol. the Quaternary period or system. [ME f. L quaternarius f. quaterni distrib. of quattuor four]
Most popular pairs with quaternary
quaternary period
quaternary animals
quaternary ammonium
quaternary amine
quaternary ammonia
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