The Collaborative International Dictionary of English v.0.48:
Perca \Per"ca\, n. [L., a perch.] (Zool.) A genus of fishes, including the fresh-water perch. [1913 Webster]WordNet (r) 3.0 (2006):
Perca n 1: type genus of the Percidae [syn: Perca, genus Perca]