EO

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eo-

  1. a combining form meaning “early,” “primeval,” used in the formation of compound words: Eocene; eohippus.

Origin of eo-

< Greek, combining form of ēṓs (Attic héōs) dawn; akin to east, Aurora

e.o.

  1. ex officio.

eo ipso

[ey-oh ip-soh; English ee-oh ip-soh]
adverb Latin.
  1. by that very fact.

eo nomine

[ey-oh noh-mi-ne; English ee-oh nom-i-nee]
adverb Latin.
  1. by that name.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for eo

dawn, eos

Examples from the Web for eo

Historical Examples of eo


British Dictionary definitions for eo

eo-

combining form
  1. early or primevalEocene; eohippus

Word Origin for eo-

from Greek, from ēōs dawn

e.o.

abbreviation for
  1. ex officio
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

Word Origin and History for eo

eo-

word-forming element used from mid-19c. (first in Eocene) in compound words formed by earth-scientists and meaning "characterized by the earliest appearance of," from Greek eos "dawn," from PIE *aus-, cognate with Modern English east (q.v.). Piltdown Man, before exposed as a fraud, was known as Eoanthropus.

Online Etymology Dictionary, © 2010 Douglas Harper