Home › Words › T › teleosteanteleosteanteleostean means any of very many ray-finned fish of the infraclass Teleostei.Among words judged in Lexicurio's Arena, teleostean ranks #12,996 of 42,747 for Qualifying.EtymologyTeleostei + -announAny of very many ray-finned fish of the infraclass Teleostei.Definitions & examples from Wiktionary (CC BY-SA 3.0).