'Idiopathic' definitions:

Definition of 'idiopathic'

From: WordNet
adjective
(of diseases) arising from an unknown cause; "idiopathic epilepsy"

Definition of 'Idiopathic'

From: GCIDE
  • Idiopathic \Id`i*o*path"ic\, Idiopathical \Id`i*o*path"ic*al\, a. [Cf. F. idiopathique.] (Med.) Pertaining to idiopathy; characterizing a disease arising primarily, and not in consequence of some other disease or injury; -- opposed to symptomatic, sympathetic, and traumatic. -- {Id`i*o*path"ic*al*ly}, adv. [1913 Webster]