| an edible clam, Mya arenaria, inhabiting waters along both coasts of North America, having an oval, relatively thin, whitish shell. |

| soft clam n. See soft-shell clam. |
| soft-shell clam n. A common edible North American clam (Mya arenaria) having a thin, elongated shell, found especially along the Atlantic coast. Also called soft clam, steamer. |