1. A cetaceous mammal, of from 6 to 10 feet in length; the coryphene, the dolphin of poets and navigators, about 5 feet in length, and celebrated for its surprising changes of colour when expiring; a heavy mass suspended from the yard-arm, to be dropped on an enemy's vessel; the handle of a gun or mortar; a spar or buoy fastened to an anchor, to which an iron ring is usually attached, to enable vessels to ride by it; a mooring-post placed at the entrance of a dock, or along a quay or wharf. The dolphin of the mast, a particular kind of wreath, formed of plaited cordage, intended to sustain the weight of the fore and main yards.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dolphine,
• dolphns,
• dolpin,
• dalphin,
• dophin,
• dolphis,
• dollphin,
• delphia,
• dolphn,
• dophine,
• duaphin,
• dollphins,
• dolfhine,
• dolphons,
• dolphens,
• dalphine,
• dolphen,
• dolophins,
• dolphines,
• dolphans

• delphinium,
• delphinus,
• delphian,
• Delphine.

The adjective form of the word "dolphin" is "dolphin".

The plural of the "dolphin" can be the "dolphins".

The singular of the "dolphin" can be the "dolphin".