spritsail

A quadrilateral sail extended by a spar running diagonally to the sail’s peak.

Nautical:

A sail extended by a sprit, chiefly used in small boats. See sprit, 3.

A sail, no longer in use, attached to a yard slung across the bowsprit of large vessels.

A sail extended by a sprit.

A sail formerly hung under the bowsprit, from the spritsail yard.

A form of three- or four-sided fore-and-aft sail and its rig, supporting the leech of the sail by means of a sprit.

a fore-and-aft sail extended by a sprit