The Collaborative International Dictionary
Pleuronectes flesus
Flounder \Floun"der\, n. [Cf. Sw. flundra; akin to Dan. flynder, Icel. fly?ra, G. flunder, and perh. to E. flounder, v.i.]
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(Zo["o]l.) A flatfish of the family Pleuronectid[ae], of many species.
Note: The common English flounder is Pleuronectes flesus. There are several common American species used as food; as the smooth flounder ( P. glabra); the rough or winter flounder ( P. Americanus); the summer flounder, or plaice ( Paralichthys dentatus), Atlantic coast; and the starry flounder ( Pleuronectes stellatus).
(Bootmaking) A tool used in crimping boot fronts.