Quaternary
- Proper noun. (geology) The geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs.
- Adjective. Of fourth rank or order.
- Adjective. Of a mathematical expression containing e.g. x4.
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This entry was last updated on RefTopia from its source on 3/20/2012.