MEANING: adjective: Relating to the leap year or the extra day in a leap year.
noun: Leap year.

ETYMOLOGY: From Latin bisextilis annus (leap year), from Latin bissextus (Feb 29: leap day), from bi- (two) + sextus (sixth), from the fact that the sixth day before the Calends of March (Feb 24) appeared twice every leap year. Earliest documented use: 1398.

BISSEL TILE - bathroom flooring you can clean with a carpet sweeper

BISS EXILE - the villainous Mr Biss has been expelled from the country

BI-SEXTILE - tertile (a third part)