The Collaborative International Dictionary of English v.0.48:
Turbot \Tur"bot\, n. [F.; -- probably so named from its shape,
and from L. turbo a top, a whirl.] (Zool.)
(a) A large European flounder (Rhombus maximus) highly
esteemed as a food fish. It often weighs from thirty to
forty pounds. Its color on the upper side is brownish
with small roundish tubercles scattered over the surface.
The lower, or blind, side is white. Called also bannock
(b) Any one of numerous species of flounders more or less
related to the true turbots, as the American plaice, or
summer flounder (see Flounder), the halibut, and the
diamond flounder (Hypsopsetta guttulata) of California.
(c) The filefish; -- so called in Bermuda.
(d) The trigger fish.
Spotted turbot. See Windowpane.