geoduck
Concise Oxford English Dictionary © 2008 Oxford University Press:
geoduck /ˈdʒiːəʊdʌk/
▶noun a giant mud-burrowing bivalve mollusc found on the west coast of North America. [Panopea generosa.]
– origin C19: from Chinook Jargon.
'geoduck' also found in these Oxford entries:

