The Collaborative International Dictionary of English v.0.48:
Bass \Bass\ (b[.a]s), n.; pl. Bass, and sometimes Basses
(b[.a]s"[e^]z). [A corruption of barse.] (Zool.)
1. An edible, spiny-finned fish, esp. of the genera Roccus,
Labrax, and related genera. There are many species.
Note: The common European bass is Labrax lupus. American
species are: the striped bass (Roccus lineatus);
white or silver bass of the lakes (Roccus chrysops);
brass or yellow bass (Roccus interruptus).
2. The two American fresh-water species of black bass (genus
Micropterus). See Black bass.
3. Species of Serranus, the sea bass and rock bass. See
4. The southern, red, or channel bass (Sci[ae]na ocellata).
Note: The name is also applied to many other fishes. See
Calico bass, under Calico.