spiral-shaped shellfish

(obsolete) spiral shellfish, especially smaller ones / (obsolete) alternate name for 蛤 (hamaguri, “clam”)

spiral shellfish, especially smaller ones / edible marine whelks of family Buccinidae / alternate name for 田螺 (tanishi): river snails of family Viviparidae

any shellfish with a spiral shell

shellfish with a spiral shell / Short for 川蜷. (kawanina): Semisulcospira libertina, a kind of freshwater snail

(obsolete) spiral shellfish, especially smaller ones

(rare) certain shellfish with a spiral shell

(archaic) veined rapa whelk, アカニシ

ameliorate, improve, better, upgrade

amelioration, improvement, betterment