spritsail

from WordNet (r) 3.0 (2006)

spritsail
    n 1: a fore-and-aft sail extended by a sprit

from The Collaborative International Dictionary of English v.0.48

Spritsail \Sprit"sail\ (spr[i^]t"s[=a]l; among seamen
   spr[i^]t"s'l), n. (Naut.)
   (a) A sail extended by a sprit.
   (b) A sail formerly hung under the bowsprit, from the
       spritsail yard.
       [1913 Webster]