n. [ F. plaise, plais, prob. fr. L. platessa flatish, plaice. See Place. ] (Zool.) (a) A European food fish (Pleuronectes platessa), allied to the flounder, and growing to the weight of eight or ten pounds or more. (b) A large American flounder (Paralichthys dentatus; called also brail, puckermouth, and summer flounder. The name is sometimes applied to other allied species. [ Written also plaise. ] [ 1913 Webster ]

Plaice mouth, a mouth like that of a plaice; a small or wry mouth. [ R. ] B. Jonson. [ 1913 Webster ]