蝸牛

(1)freshwater or marine or terrestrial gastropod mollusk usually having an external enclosing spiral shell

(2)たいてい外側に封入する渦巻き状の貝殻を持つ、淡水または海洋性・地上性腹足類の軟体動物

(3)the snail-shaped tube (in the inner ear coiled around the modiolus) where sound vibrations are converted into nerve impulses by the organ of Corti

(4)コルチ器官によって音の震動が神経インパルスに変換される内耳のカタツムリ型の管