Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes.

synoniemen: hard-shell clam, quahog, round clam.

An edible American clam; the heavy shells were used as money by some American Indians.

synoniemen: hard-shell clam, hard clam, Mercenaria mercenaria, quahog, round clam, Venus mercenaria.