shell sac
Noun
Meaning
shell sac (plural shell sacs)
(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.
Noun
shell sac (plural shell sacs)
(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.