Plaice, n. (pl. same)
1 a European flatfish, Pleuronectes platessa, having a brown back with orange spots and a white underside, much used for food.
2 (in full American plaice) a N. Atlantic fish, Hippoglossoides platessoides.
ME f. OF pla{iuml}z f. LL platessa app. f. Gk platus broad