shell sac

English

Noun

shell sac (plural shell sacs)

1. (zoology) 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.
   • 2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 115:

     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.

Anagrams

• shellacs