外がい套とう膜まく

noun

mantle (of an invertebrate)

Biological term for the soft outer body wall of mollusks and some other invertebrates.

• 貝かいの外がい套とう膜まくは殻からを形けい成せいする役やく割わりを持もつ。

  The mantle of a shellfish plays a role in forming the shell.