luff

Loof \Loof\ (l[=oo]f or l[u^]f; 277), n. [See {Luff}.] [Also written {luff}.] (Naut.) (a) Formerly, some appurtenance of a vessel which was used in changing her course; -- probably a large paddle put over the lee bow to help bring her head nearer to the wind. (b) The part of a ship's side where the planking begins to curve toward bow and stern. [1913 Webster]