Meaning of "quaternary" : Online English Dictionary : Word Search by Wordhut.com

Meaning of quaternary

1. (n) the cardinal number that is the sum of three and one

2. (n) last 2 million years

3. (adj.sat.) 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"

4. (adj.sat.) consisting of or especially arranged in sets of four; "quaternate leaves"; "a quaternary compound"

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