• synonyms

ink sac



a large gland in most cephalopods, as the cuttlefish, octopus, and squid, that is near the rectum and ejects ink at predators.
a flexible structure containing ink.


10 French Loanwords We Love To Say In EnglishRead more in this article about some frequently asked questions and fun facts related to our definitions.

Nearby words

ink, ink ball, ink fountain, ink in, ink jet, ink sac, ink up, ink-cap, ink-jet printing, inkatha, inkberry Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ink sac

  • They are without an ink-sac, and have the foot divided into lobes bearing sheathed tentacles.

    The Sea-beach at Ebb-tide|Augusta Foote Arnold
  • In certain cases remains of the arms provided with hooks, and of the ink-sac, have been recognized.

  • The ink-sac, absent in Nautilus, is a rectal caecum developed from its dorsal wall.

  • The ink taken from the ink-sac of Sepia is an article of commerce.

    The Sea-beach at Ebb-tide|Augusta Foote Arnold