Palaeocene

adjective

of, denoting, or formed in the first epoch of the Tertiary period, which lasted for 10 million years

noun

the Palaeocene the Palaeocene epoch or rock series

Word Origin for Palaeocene

C19: from French from paléo- palaeo- + Greek kainos new, recent
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012