Found 2 items, similar to Quaternary.
English → English (WordNet) Definition: Quaternary Quaternary n 1: last 2 million years [syn: Quaternary period, Age of Man] 2: the cardinal number that is the sum of three and one [syn: four, 4, IV, tetrad, quatern, quaternion, quaternity, quartet, quadruplet, foursome, Little Joe]
English → English (gcide) Definition: Quaternary 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] 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]