Consanguineous \kon-san(g)-GWIN-ee-us\ , adjective;
1. Of the same blood; related by birth; descended from the same parent of ancestor
According to Etymonline.com:
This word dates to the 1600's and comes from Latin consanguineus or "of the same blood." It is a combination of com- + sanguineus ("together" + "of blood")
Now go spend time with your favorite people, consanguineous or otherwise!
*Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Thursday, November 25