an edible American clam; the heavy shells were used as money by some American Indians 同义词：quahog, hard-shell clam, hard clam, round clam, Venus mercenaria, Mercenaria mercenaria,
Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes 同义词：quahog, hard-shell clam, round clam,
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