Ex delicto is a Latin term that means "from a transgression" or "from a wrong." In legal parlance, it refers to the actions that arise as a consequence of a civil wrong. It is also used to refer to the actions that arise as a consequence of a crime.
Ex delicto is frequently used in situations where ex contractu doesn't apply. While ex contractu is generally used to refer to actions that arise from the breach of a contract, ex delicto refers to the actions that arise as a consequence of a tort, fault, felony, or misdemeanor. Ex delicto has lost much of its former significance and is generally used only in academic circles.