Spinnaker

['spɪnəkə] or ['spɪnəkɚ]

(noun.) a large and usually triangular headsail; carried by a yacht as a headsail when running before the wind.

Editor: Val--From WordNet

(n.) A large triangular sail set upon a boom, -- used when running before the wind.

Typist: Natalie

n. a jib-headed sail sometimes carried on the side opposite the mainsail by racing yachts.

Typed by Floyd