ink sac

English

Noun

ink sac (plural ink sacs)

  1. (zoology) A muscular bag found in certain cephalopods used to generate ink.
    • 2017, Mark Carnall, The Guardian, 9 August:
      The ink sac feeds into the rectum, controlled by a sphincter and in some inking events mucus from another organ, the funnel organ is ejected with water and ink through the anus and the siphon to create a cloud of ink.

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