Pol"lack (?), n. [Cf. G. & D. pollack, and Gael. pollag a little pool, a sort of fish.] (Zoöl.) (a) A marine gadoid food fish of Europe (Pollachius virens). Called also greenfish, greenling, lait, leet, lob, lythe, and whiting pollack. (b) The American pollock; the coalfish.