Search Result for "main-topmast": 
Wordnet 3.0

NOUN (1)

1. the topmast next above the mainmast; 



The Collaborative International Dictionary of English v.0.48:

main-topmast \main-topmast\ n.
   the mast next above the mainmast.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

main-topmast
    n 1: the topmast next above the mainmast