Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
The second (present) period of the Cenozoic era: 2 million to the present.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
Switch to new thesaurus
|Noun||1.||Quaternary period - last 2 million years|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.