Exceptio dilatoria

Definition of Exceptio dilatoria

A dilatory exception; called also “temporalis” (temporary); one which defeated the action for a time (qua: ad tempus nocet), and created delay (ef temporis dilationem tribuit); such as an agreement not to sue within a certain time, as five years.

That's the definition of Exceptio dilatoria in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.