(nautical) A sail supplemental to the mainsail, especially a triangular one, used on yachts for running before the wind.
(nautical) A sail having characteristics of a genoa and a spinnaker.
A large triangular sail set upon a boom, - used when running before the wind.
A gennaker is a sail that was developed around 1990. Used when sailing downwind, it is a cross between a genoa and a spinnaker.
large and usually triangular headsail; carried by a yacht as a headsail when running before the wind
A spinnaker is a sail designed specifically for sailing off the wind from a reaching course to a downwind, i.e. with the wind 90–180° off bow.