gullwing

/G AH1 L W IH0 NG/
noun
  1. 1

    A position of sails in a fore-and-aft rigged sailboat, in which the mainsail is set to the leeward and the jib to the windward. This position may be used when running (almost) straight downwind.

noun
  1. 1

    One of a pair of doors, as of an aircraft, resembling a gull's wings when open.

adjective
  1. 1

    (of a door, flap, wings etc.) Resembling a gull's wings.

Source: https://en.wiktionary.org/wiki/goose%20wing, https://en.wiktionary.org/wiki/gullwing