(n.) A fore-and-aft sail, abaft the foremast or the mainmast, hoisted upon a small supplementary mast and set with a gaff and no boom; a trysail carried at the foremast or mainmast; -- named after its inventor, Knight Spencer, of England [1802].
SPENCER
Meaning of SPENCER in English
Webster's English dictionary. Английский словарь Webster. 2012