Definition of eo- in English:

eo-

Syllabification: eo-

combining form

  • Early, primeval: eohippus

Origin

from Greek, ēṓs, 'dawn.'.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space