Definitions of protosun - OneLook James Austin • Apr 07, 2026 updates Definitions from Wiktionary (protosun)▸ noun: Synonym of protostarprotopod, monostele, star shower, probiont, extrasolar planet, submoon, protoceratopsian, hyperoctant, prostylos, astrotech, more...▸ Words similar to protosun▸ Usage examples for protosun▸ Idioms related to protosun▸ Civic discussion about protosun (New!)▸ Popular adjectives describing protosun▸ Words that often appear near protosun▸ Rhymes of protosun▸ Invented words related to protosun