What is Nullum Arbitrium?

Legal Definition
Pleading. The name of a plea to an action on an arbitra- tion bond for not fulfilling the award, by which the defendant asserts that there is no award.
-- Bouviers Law Dictionary
Legal Definition
L. Lat. No award. The name of a plea in an action on an arbitration band, for not fulfilling the award, by which the defendant traverses the allegation that there was an award made.
-- Black's Law Dictionary
Legal Definition
-- Ballentine's Law Dictionary