Source : Webster's Revised Unabridged Dictionary (1913)

Sole \Sole\, n. [F. sole, L. solea; -- so named from its flat
   shape. See {Sole} of the foot.] (Zo["o]l.)
   (a) Any one of several species of flatfishes of the genus
       {Solea} and allied genera of the family {Soleid[ae]},
       especially the common European species ({Solea
       vulgaris}), which is a valuable food fish.
   (b) Any one of several American flounders somewhat resembling
       the true sole in form or quality, as the California sole
       ({Lepidopsetta bilineata}), the long-finned sole
       ({Glyptocephalus zachirus}), and other species.

   {Lemon}, or {French}, {sole} (Zo["o]l.), a European species
      of sole ({Solea pegusa}).

   {Smooth sole} (Zo["o]l.), the megrim.