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id·io·path·ic .id-ē-ə-'path-ik adj arising spontaneously or from an obscure or unknown cause: PRIMARY <\idiopathic epilepsy> <\idiopathic thrombocytopenic purpura>
id·io·path·i·cal·ly -'path-i-k(ə-)lē adv
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adj.
denoting a disease or condition the cause of which is not known or that arises spontaneously.
• idiopathy n.
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id·io·path·ic (id″e-o-pathґik) of unknown cause or spontaneous origin; of the nature of an idiopathy. Called also agnogenic.Medical dictionary. 2011.