The Collaborative International Dictionary
main-topsail
main-topsail \main-topsail\ n. a topsail set on the mainmast.
WordNet
main-topsail
n. a topsail set on the mainmast
Usage examples of "main-topsail".
The hands at the braces were backing the main-topsail, and Hotspur could lie hove-to in peace and quiet.
A few moments later the main-topsail was set, followed by the jib topsail, and while the men afted the sheets under Southwick's orders, Ramage looked at his watch and then at the luffs of the sails.