石いし巻まき貝がいMeaningsNoun1. Clithon retropictus (water snail species)Kanji used石stone巻scroll貝shellfishComposed of石いしstone; rock; pebble; jewel; precious stone; flint (in a lighter); (round) game piece; stone (in go, etc.); disc (in Othello); stone (in the bladder, kidney etc.); …Noun巻まき貝がいsnail; spiral shellNoun