Jointure \JOIN-cher\ , noun;
1. Property given to a woman upon marriage, to be owned by her after her husband's death
This word dates to the late 14th century from French jointure, which derives from Latin junctura ("a joining, uniting, a joint") from junctus, the past participle of jungere ("to join"). Jungere comes from Proto-Indo-European *yeug- ("to join") and is the forebear of jugular and juncture.
Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Wednesday, August 17
Etymologies come from the Oxford English Dictionary and/or Etymonline.com