topsail

English Thesaurus

1. a sail (or either of a pair of sails) immediately above the lowermost sail of a mast and supported by a topmast (noun.artifact)

hypernym	:	canvas, canvass, sail, sheet,
definition	:	a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel (noun.artifact)

hyponym	:	fore-topsail,
definition	:	the topsail on a foremast (noun.artifact)