See under lemon sole.
Origin of winter flounder
An Americanism dating back to 1805–15
any of various popular food flatfishes, as Parophrys vetulus of the Pacific (English sole) and Pseudopleuronectes americanus of the Atlantic (winter flounder or blackback flounder).
Origin of lemon sole
1875–80; probably alteration, by folk etymology, of French limande dab (fish), Old French limande, lime, of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a European flatfish, Microstomus kitt, with a variegated brown body: highly valued as a food fish: family Pleuronectidae
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012