Naturalists understand by this word numerous species of small cetaceous animals of the genus Delphinus, found in nearly all seas.
They greatly resemble porpoises, and are often called by this name by sailors; but they are distinguished by having a longer and more slender snout. The word is also generally, but less correctly, applied to a fish, the dorado (Coryphæna hippuris), celebrated for the changing hues of its surface when dying. Also, a small light ancient boat, which gave rise to Pliny's story of the boy going daily to school across the Lucrine lake on a dolphin. Also, in ordnance, especially brass guns, two handles nearly over the trunnions for lifting the guns by. Also, a French gold coin (dauphine), formerly in great currency. Also, a stout post on a quay-head, or in a beach, to make hawsers fast to. The name is also given to a spar or block of wood, with a ring-bolt at each end, through which a hawser can be rove, for vessels to ride by; the same as wooden buoys.