Wordnet 3.0
ADJECTIVE (1)
1.
(of diseases) arising from an unknown cause;
- Example: "idiopathic epilepsy"
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
idiopathic
adj 1: (of diseases) arising from an unknown cause; "idiopathic
epilepsy"