Cor"mo*rant (kôr"m&osl;*rant), n. [F. cormoran, fr. Armor. mōr-vran a sea raven; mōr sea + bran raven, with cor, equiv. to L. corvus raven, pleonastically prefixed; or perh. fr. L. corvus marinus sea raven.] 1. (Zoöl.) Any species of Phalacrocorax, a genus of sea birds having a sac under the beak; the shag. Cormorants devour fish voraciously, and have become the emblem of gluttony. They are generally black, and hence are called sea ravens, and coalgeese. [Written also corvorant.]

2. A voracious eater; a glutton, or gluttonous servant. B. Jonson.

• A medium-large seabird of the family Phalacrocoracidae, that has black plumage and dives for fish.