The Collaborative International Dictionary of English v.0.48:Mercenaria \Mer`ce*na"ri*a\, n. [NL. See Mercenary.] (Zool.) The quahog. [1913 Webster] WordNet (r) 3.0 (2006):Mercenaria n 1: a genus of Veneridae [syn: Mercenaria, genus Mercenaria]