Usufruct

The right to use and enjoy the profits and advantages of something belonging to someone else, as long as the property is not altered in any way.  In the case of a Last Will and Testament, an asset that is bequeathed to one person but the use is given to someone else, usually for the remained of that person’s life (i.e. a husband might leave a house to his children but the use of the house to his wife until she dies).