Eocene

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈiːəʊˌsiːn/US:USA pronunciation: respellingUSA pronunciation: respelling(ē′ə sēn′)


WordReference Random House Unabridged Dictionary of American English © 2025
E•o•cene  (ē′ə sēn′),USA pronunciation [Geol.]
adj. 
  1. Geologynoting or pertaining to an epoch of the Tertiary Period, occurring from 55 to 40 million years ago and characterized by the advent of the modern mammalian orders. See table under geologic time. 

n. 
  1. Geologythe Eocene Epoch or Series.
  • eo- + -cene 1825–35

Collins Concise English Dictionary © HarperCollins Publishers::
Eocene / ˈiːəʊˌsiːn/
  1. of, denoting, or formed in the second epoch of the Tertiary period, which lasted for 20 000 000 years, during which hooved mammals appeared
  1. the Eocene ⇒ the Eocene epoch or rock series
Etymology: 19th Century: from eo- + -cene
'Eocene' also found in these entries (note: many are not synonyms or translations):
EO - Paleogene - Tertiary - amblypod - condylarth - coryphodon - eo- - eohippus - post-Eocene - titanothere - uintathere

Forum discussions with the word(s) "Eocene" in the title:


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