The Collaborative International Dictionary of English v.0.48:

Periculum \Pe*ric"u*lum\, n.; pl. Pericula. [L.] (Rom. &
   O.Eng. Law)
   1. Danger; risk.
      [1913 Webster]

   2. In a narrower, judicial sense: Accident or casus, as
      distinguished from dolus and culpa, and hence relieving
      one from the duty of performing an obligation.
      [1913 Webster]