spinnaker
/ˈspɪnəkə(r)/noun
- a large three-cornered sail, typically bulging when full, set forward of the mainsail of a racing yacht when running before the wind（赛艇的）大三角帆。
词源
mid 19th cent.: apparently a fanciful formation from Sphinx, the name of the yacht first using it, perhaps influenced by SPANKER.