XIII may refer to: *

13 (number) 13 (thirteen) is the natural number following 12 (number), 12 and preceding 14 (number), 14. Folklore surrounding the number 13 appears in many cultures around the world: one theory is that this is due to the cultures employing lunar-solar calen ...

or XIII in Roman numerals *

13th century The 13th century was the century which lasted from January 1, 1201 (represented by the Roman numerals MCCI) through December 31, 1300 (MCCC) in accordance with the Julian calendar. The Mongol Empire was founded by Genghis Khan, which stretched ...

in Roman numerals * ''XIII'' (comics), a Belgian comic book series by Jean Van Hamme and William Vance ** ''XIII'' (2003 video game), a 2003 video game based on the comic book series ** ''XIII'' (2020 video game), a remake of the 2003 video game ** '' XIII: The Conspiracy'', a TV miniseries based on the comic book series and game of the same title ** '' XIII: The Series'', a 2011 TV series based on the comic book series and miniseries * ''XIII'' (Rage album), 1998 * ''XIII'' (Mushroomhead album), 2003 * ''XIII'' (TNT album), 2018 *

Factor XIII Factor XIII, or fibrin stabilizing factor, is a plasma protein and zymogen. It is activated by thrombin to factor XIIIa which crosslinks fibrin in coagulation. Deficiency of XIII worsens clot stability and increases bleeding tendency. Huma ...

, a clotting factor inside the coagulation cascade *

Rugby league Rugby league football, commonly known as rugby league in English-speaking countries and rugby 13/XIII in non-Anglophone Europe, is a contact sport, full-contact sport played by two teams of thirteen players on a rectangular Rugby league playin ...

, still often known as just ''XIII'' in France due to the name Rugby once being forbidden for the league code

See also