Definition of cuttlefish in English:



  • A swimming marine mollusk that resembles a broad squid, having eight arms and two long tentacles that are used for grabbing prey. Its internal skeleton is cuttlebone, which it uses for adjusting buoyancy.

    • ‘Ammonoids are descendants of the extinct, primitive coiled nautiloids and they are extinct relatives of modern squid, octopus, cuttlefish, and nautilus.’
    • ‘Her current experiments on learning suggest that both cephalopods do well with spatial learning; cuttlefishes seem to learn their way around a maze with the same facility as octopuses.’
    • ‘The whale's prey includes squid, cuttlefish, herring, and sea stars, or starfish.’
    • ‘Nautilus shells are often used decoratively, and the internal shell of a cuttlefish, or cuttle bone, is sold in the pet trade as a calcium source for birds.’
    • ‘Both cuttlefish and squid may be called inkfish.’


Late 16th century: from cuttle + fish.