Definitions from Wiktionary (shell sac)
▸ noun: (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.
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▸ noun: (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.
Similar:
Needham's sac,
saccus,
sacculation,
paragaster,
siphuncle,
somatocyst,
living chamber,
prodissoconch,
sacculina,
pneumatocyst,
more...
Opposite:
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▸ Wikipedia articles (New!)
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▸ Invented words related to shell sac