surf clam definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various large clams (genera Mactra and Spisula) living in habitats influenced by the surf
surf clam definition by American Heritage Dictionary
Any of various usually large edible clams of the family Mactridae, commonly living in the surf of coastal waters.