Where does “oosporangium” come from?

oosporangium (English) comes from English oö-, from Ancient Greek ᾠο-, from Ancient Greek ᾠόν, from Proto-Hellenic ōyyón, from Proto-Indo-European h₂ōwyóm, from Proto-Indo-European h₂éwis — bird.

oosporangium (English): An oogonium; A case containing oval or rounded...

Definitions

An oogonium; A case containing oval or rounded...

Ancestry of “oosporangium”, step by step

Step	Language	Word	Meaning
1	English	oö-	Alternative spelling of oo-; egg
2	Ancient Greek	ᾠο-	oo-
3	Ancient Greek	ᾠόν	egg; seed
4	Proto-Hellenic	ōyyón	egg
5	Proto-Indo-European	h₂ōwyóm	egg
6	Proto-Indo-European	h₂éwis	bird

Every word from Proto-Indo-European h₂éwis →Every word from Proto-Indo-European h₂ōwyóm →Every word from Proto-Hellenic ōyyón →