Webster's Revised Unabridged Dictionary · 1913

Plaice

Plaice , noun

[French plaise, plais, prob. from Latin platessa flatish, plaice. See Place.]

(a)
(Zoology) A European food fish (Pleuronectes platessa), allied to the flounder, and growing to the weight of eight or ten pounds or more.
(b)
(Zoology) A large American flounder (Paralichthys dentatus; called also brail, puckermouth, and summer flounder. The name is sometimes applied to other allied species.
Collocations (1)
Plaice mouth , a mouth like that of a plaice; a small or wry mouth. [Rare] — B. Jonson