Definition of geoduck in US English:

geoduck

noun

  • A giant mud-burrowing bivalve mollusk occurring on the west coast of North America, where it is collected for food. Its shell valves are not large enough to enclose its body and very long siphon.

    Panopea generosa, family Hyatellidae

    • ‘The prized geoduck - the largest burrowing clam in the world - is occasionally found among the gaper clams in Tomales Bay.’
    • ‘Common and widely available clam varieties from the Pacific Coast include geoducks, littlenecks, and Manila clams.’
    • ‘Efforts were made in the 19th century to establish geoducks on the Atlantic coast, but they failed.’
    • ‘As we dip thin slices of raw geoduck into seasoned soy, the clean, fresh sweetness of the clam seems to affirm these thoughts.’
    • ‘Individual quotas have been introduced in certain pacific fisheries (e.g., for abalone, herring, geoduck, sablefish and halibut), and in freshwater fisheries.’

Origin

Late 19th century: from Chinook Jargon.

Pronunciation

geoduck

/ˈɡo͞oēˌdək/