ascidian/əˈsɪdi.ən/EtymologyFrom New Latin Ascidia + -an, from Ancient Greek ἀσκίδιον (askídion, “wineskin, leather bag”).ascidian means any member of the class Ascidiacea (the sea squirts). Lexicurio rates it Sui generis — a strength score of 85 out of 100.nounAny member of the class Ascidiacea (the sea squirts)