Pronunciation: (pā'lē-u-sēn" or, esp. Brit., pal'ē-), [key] Geol.
noting or pertaining to an epoch of the Tertiary Period, from 65 to 55 million years ago, and characterized by a proliferation of mammals. See table under geologic time.
the Paleocene Epoch or Series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.