shell sac

名词 n.

英文释义

名词 n.
  1. The sac in which the shell of a mollusc is secreted during development; (now especially) the fold of mantle in which a cephalopod secretes its pen or gladius.
    — Baby cephalopods, even octopuses, all have a shell sac, which is comparable to the mantle folds that baby clams and snails use to make their shells.

词形变化

shell sacs plural
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