Definition of argonaut in US English:



  • A small floating octopus, the female of which has webbed sail-like arms and secretes a thin coiled papery shell in which the eggs are laid.

    Genus Argonauta, order Octopoda

    Also called paper nautilus
    • ‘The coleoids include modern squids, cuttlefish, octopuses, and the argonauts or paper-nautilus, together with extinct groups such as the belemnites.’
    • ‘One of the most astounding cephalopods is the paper nautilus also known as argonaut.’
    • ‘These ammoniac egg cases/brood chambers closely resemble the female Argonauta shell, produced for this purpose by the adult argonaut.’
    daredevil, seeker of adventures, hero, heroine, swashbuckler, knight errant, crusader, venturer, traveller, voyager, wanderer
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