The story
PIE word *h₂ōwyóm From oo- (prefix denoting something relating to eggs or ova) + -sphere, modelled after French oosphère.
Etymology from Wiktionary, CC BY-SA 4.0.
oosphere
oo·sphereToday it means: A large nonmotile egg cell, especially of an alga or fungus, formed in an oogonium and ready for fertilization. Full definition →