Definition of lugsail in English:

lugsail

noun

  • An asymmetrical four-sided sail which is bent on and hoisted from a steeply inclined yard.

    • ‘As you see, the balanced lug sail pivots around the mast.’
    • ‘Modern and novice sailors are horrified about the lugsail being distorted by pressing against the mast on one tack but the effect is quite slight.’

Origin

Late 17th century: probably from lug + the noun sail.

Pronunciation:

lugsail

/ˈlʌɡs(ə)l//ˈlʌɡseɪl/