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Definition of SOLE
: any of various flatfishes (family Soleidae) having a small mouth, small or rudimentary fins, and small eyes placed close together and including important food fishes (as the European Dover sole); also: any of various mostly market flatfishes (as lemon sole) of other families (as Pleuronectidae)
: the somewhat concave plate of moderately dense horn that covers the lower surface of the coffin bone of the horse, partly surrounds the frog, and is bounded externally by the wall
Illustration of SOLE
Dover sole (Solea solea)—Jacques Six
Any of several flatfishes, especially about 100 species in the family Soleidae. Those found from Europe to Australia and Japan are marine; some New World species live in freshwater. The eyes are on the right side of the head. The Dover sole (Solea solea), found from estuaries to offshore waters in the eastern Atlantic and Mediterranean, grows to 20 in. (50 cm) long. The hogchoker (Trinectes maculatus), seldom over 10 in. (25 cm) long, is found in shallow coastal waters from New England to Central America and far inland in habitats associated with large rivers.