DONKEY-ENGINE. An auxiliary steam-engine for feeding the boilers of the principal engine when they are stopped; or for any other duties independent of the ship's propelling engines.
DONKEY-FRIGATE. Those of 28 guns, frigate-built; that is, having guns protected by an upper deck, with guns on the quarter-deck and forecastle; ship-sloops, in contradistinction to corvettes and sloops.
DOOLAH. A passage-boat on the Canton river.
DOOTED. Timber rendered unsound by fissures.
DORADO. The Coryphæna hippuris, an oceanic fish; often called "dolphin."
DOREY. A flat-floored cargo-boat in the West Indies, named after the fish John Dory.
DORNICLE. A northern name for the viviparous blenny.
DORRA. From the Gaelic dorga; a crab-net.
DORSAL FIN. The median fin placed upon the back of fishes.