What is Actio Noxalis?

Legal Definition
A noxal action ; an action which lay against a master for a crime Committed or injury done by his slave; and in which the master had the alternative either to pay for the damage done or to deliver up the slave to the complnining party. Inst. 4, 8, pr.; Heinecc. Elem. lib. 4, lit. 8. So called from noxa, the offence or injury committed . Inst. 4, 8, 1.
-- Black's Law Dictionary