mizenmast

from WordNet (r) 3.0 (2006)

mizenmast
    n 1: third mast from the bow in a vessel having three or more
         masts; the after and shorter mast of a yawl, ketch, or
         dandy [syn: {mizzenmast}, {mizenmast}, {mizzen}, {mizen}]

from The Collaborative International Dictionary of English v.0.48

mizenmast \mizenmast\ n.
   mizzenmast.

   Syn: mizzen, mizen.
        [WordNet 1.5]