0 a type of large clam (= a sea creature with a shell with two parts) that has a small shell and a larger soft part that sticks out from the shell. It is eaten as a special food in some countries:
The geoduck is a huge clam found on the Pacific coast of North America.
It seems unlikely that the geoduck clam will ever become a staple on the British dinner table.
Neighbours opposed his family's plans to develop a geoduck farm.
