plea of insanity

English Thesaurus

1. (criminal law) a plea in which the defendant claims innocence due to mental incompetence at the time (noun.communication)

hypernym	:	plea,
definition	:	(law) a defendant's answer by a factual matter (as distinguished from a demurrer) (noun.communication)

domain category	:	criminal law,
definition	:	the body of law dealing with crimes and their punishment (noun.communication)