Where does “oocyte” come from?

Oocyte comes from Ancient Greek ᾠο- (egg-related prefix) and ᾠόν (egg), which derive from Proto-Indo-European h₂ōwyóm and ultimately h₂éwis (sheep), reflecting the original sense of a small animal or creature.

oocyte (English): A cell that develops into an egg or ovum; a...