The Collaborative International Dictionary
round clam
Quahog \Qua"hog\, Quahaug \Qua"haug\, n. [Abbrev. fr. Narragansett Indian poqua[^u]hock.] (Zo["o]l.) An American market clam ( Venus mercenaria). It is sold in large quantities, and is highly valued as food. Called also round clam, and hard clam.
Note: The name is also applied to other allied species, as Venus Mortoni of the Gulf of Mexico.
Wiktionary
round clam
n. quahog
WordNet
round clam
n. Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes [syn: quahaug, quahog, hard-shell clam]
an edible American clam [syn: quahog, quahaug, hard-shell clam, Venus mercenaria, Mercenaria mercenaria]