'Pleistocene' definitions:
Definition of 'Pleistocene'
From: WordNet
noun
From two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution [syn: Pleistocene, Pleistocene epoch, Glacial epoch]
Definition of 'Pleistocene'
From: GCIDE
- Pleistocene \Pleis"to*cene\, a. [Gr. ? most + ? new.] (Geol.) Of or pertaining to the epoch, or the deposits, following the Tertiary, and immediately preceding man. -- n. The Pleistocene epoch, or deposits. [1913 Webster]