ovi-

"an egg," in a broad biological sense; "the proper product of an ovary," 1706, from Latin ōvum "egg," cognate with Greek ōon, Old Norse egg, Old English æg, from PIE *ōwyo‑, *ōyyo‑ "egg," which is perhaps a derivative of the root *awi- "bird." The proper plural is ova.

Old English eowu "female sheep," fem. of eow "sheep," from Proto-Germanic *awi, genitive *awjoz (source also of Old Saxon ewi, Old Frisian ei, Middle Dutch ooge, Dutch ooi, Old High German ouwi "sheep," Gothic aweþi "flock of sheep"), from PIE *owi- "sheep" (source also of Sanskrit avih, Greek ois, Latin ovis, Lithuanian avis "sheep," Old Church Slavonic ovica "ewe," Old Irish oi "sheep," Welsh ewig "hind").

1812, "egg-eating;" 1865, "sheep-eating;" see ovi- + -vorous.