shell sac

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

(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.

日本語の意味

(動物学) 軟体動物が発生の過程で分泌する殻を形成する嚢。 / (特に現在) 頭足類において、ペンまたはグラディウス（内部分泌物）の分泌に関与するマントルのひだ。

英語の意味

(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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During the larval stage, the mollusc's shell sac secretes layers of calcium carbonate that build its protective shell.

幼生期に、軟体動物の殻嚢は炭酸カルシウムの層を分泌して保護殻を形成する。

詳細

意味（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.

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.

詳細

shell sacs （ plural ）