quaternary

1. a. Consisting of four; by fours, or in sets of four. Source: opted

2. a. Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man. Source: opted

3. n. The number four. Source: opted

4. n. The Quaternary age, era, or formation. See the Chart of Geology. Source: opted

5. adj. consisting of or especially arranged in sets of four Source: wordnet

6. adj. coming next after the third and just before the fifth in position or time or degree or magnitude Source: wordnet

7. n. the cardinal number that is the sum of three and one Source: wordnet

8. 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. 1. The number four. Boyle. 2. (Geol.) The Quaternary age, era, or formation. See the Chart of Geology. Source: webster

9. Later than, or subsequent to, the Tertiary; Post-tertiary; as,the Quaternary age, or Age of man. Source: adambom

10. j:100 n. last 2 million years Source: ecdict

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