ˈjan(t) thənə noun
Etymology: New Latin, from Latin ianthina, feminine of ianthinus violet-blue, from Greek ianthinos, from ion violet + anthos flower — more at violet , anthology
1. capitalized : the type genus of Janthinidae comprising pelagic snails of warm seas that have a thin spiral purple shell, a large head, and protrusible gills
2. -s : any snail of the genus Janthina