Mainsheet

n. rope used to direct the mainsail

In sailing, a sheet is a line (rope, cable or chain) used to control the moveable corner(s) of a sail.
See more at Wikipedia.org...

Noun
1. (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
(synonym) sheet, tack, weather sheet, shroud
(hypernym) line
(hyponym) futtock shroud
(part-holonym) ship
(classification) seafaring, navigation, sailing

(n.)
One of the ropes by which the mainsail is hauled aft and trimmed.
  

mainsheet
danh từ (hàng hải) dây kéo lá buồm chính
(C) 2007 www.TừĐiểnTiếngViệt.net