01 Any one of the large bivalve mollusks found on the open seacoast, especially those of the family Mactridae, as the common American species.…
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Any one of the large bivalve mollusks found on the open seacoast, especially those of the family Mactridae, as the common American species. (Mactra solidissima or Spisula solidissima); -- called also beach clam, and surf clam.(Zool.) Also: beach clam, surf clam