topmast

from WordNet (r) 3.0 (2006)
topmast
    n 1: the mast next above a lower mast and topmost in a fore-and-
         aft rig
from The Collaborative International Dictionary of English v.0.48
Topmast \Top"mast\, n. (Naut.)
   The second mast, or that which is next above the lower mast,
   and below the topgallant mast.
   [1913 Webster]
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