a North American freshwater game fish, Micropterus salmoides, having an upper jaw extending behind the eye and a broad, dark, irregular stripe along each side of the body. Compare smallmouth bass.
large·mouth bass (lärj'mouth') n. A North American freshwater food and game fish (Micropterus salmoides), mostly grayish black with a dark irregular stripe along each side and a large upper jaw extending past the eye.