GEODUCK Meaning of GEODUCK in English [ 'dʒi:əʊdʌk ]■ noun a giant mud-burrowing bivalve mollusc found on the west coast of North America. [ Panopea generosa .]OriginC19: from Chinook Jargon. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004