The most recent term was determinable, which is defined as:
adj. defining something which may be terminated upon the occurrence of a particular event, used primarily to describe an interest in real property, such as a fee simple determinable, in which property is deeded to another, but may revert to the giver or go to a third person if, as examples, the receiver (grantee) marries, divorces or no longer lives in the house.
Jim Rose was kind enough to offer a guess, but was a bit off the mark.
Today's term is:
As always, no dictionaries, please.