eo-

enUK

eo-

(word root) dawn, earlyExamples of words with the root eo-: Eocene

eo-

pref. Most primitive; earliest: eoraptor.
[From Greek ēōs, dawn; see aus- in Indo-European roots.]

eo-

combining form early or primeval: Eocene; eohippus. [from Greek, from ēōs dawn]

EO

executive order.

eo-

a combining form meaning “early,” “primeval”: Eocene; eohippus. [< Greek, comb. form of ēṓs (Attic héōs) dawn; akin to east, Aurora]

e.o.

ex officio.