O-


Meaning of O- in English

I. combining form

or oo-

Etymology: Greek ōi-, ōio-, from ōion egg — more at egg

: egg

o idium

oo logy

specifically : ovum

oo genesis

oo gonium

II. abbreviation

ortho-

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.