Home › Words › L › lithosianlithosianlithosian means any of various moths once grouped in the former family Lithosiidae, now mostly classified in the subfamily Arctiinae of family Erebidae.Among words judged in Lexicurio's Arena, lithosian ranks #15,896 of 42,752 for Qualifying.EtymologyFrom Latin Lithosia, the typical genus, from Ancient Greek λίθος (líthos, “a stone, a rock”).nounAny of various moths once grouped in the former family Lithosiidae, now mostly classified in the subfamily Arctiinae of family Erebidae.Definitions & examples from Wiktionary (CC BY-SA 3.0).