Collins Concise English Dictionary © HarperCollins Publishers::
eo-
  1. early or primeval: Eocene, eohippus
Etymology: from Greek, from ēōs dawn
WordReference Random House Unabridged Dictionary of American English © 2025
EO, 
  1. executive order.

eo-, 
  1. a combining form meaning "early,'' "primeval,'' used in the formation of compound words:Eocene; eohippus.
  • Greek, combining form of ēó̄s (Attic héōs) dawn; akin to east, Aurora

e.o., 
  1. ex officio.

'eo-' also found in these entries (note: many are not synonyms or translations):

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


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