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common name for any member of the unique and widespread order Pleuronectiformes containing over 500 species (including the flounder, halibut, plaice, sole, and turbot), 130 of which are American.
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Either of two large species of flatfishes in the genus Hippoglossus; commonly known as a right-eye flounder.
1. the largest flatfish: a dark green North Atlantic species, Hippoglossus hippoglossus, that is a very important food fish: family Pleuronectidae
2. any of several similar and related flatfishes, such as Reinhardtius hippoglossoides (Greenland halibut)