Black bass \Black" bass`\ (Zool.) 1. An edible, fresh-water fish of the United States, of the genus {Micropterus}. The small-mouthed kind is {Micropterus dolomie[imac]}; the large-mouthed is {Micropterus salmoides}. [1913 Webster] 2. The sea bass. See {Blackfish}, 3. [1913 Webster]