"Healing art" means any system, treatment, operation, diagnosis, prescription or practice for the ascertainment, cure, relief, palliation, adjustment or correction of any human disease, ailment, deformity, injury, or unhealthy or abnormal physical or mental condition for the practice of which long periods of specialized education and training and a degree of specialized knowledge of an intellectual as well as physical nature are required.
(Added to NRS by 1977, 940)