Ideology, ī-de-ol′o-ji, n. the science of ideas, metaphysics.—adjs. Ideolog′ic, -al.—n. Ideol′ogist, one occupied with ideas having no significance: a mere theorist—also Idē′ologue. [Gr. idea, idea, logia, discourse.]

Ideopraxist, ī-de-ō-prak′sist, n. one who is impelled to carry out an idea. [Gr. idea, idea, praxis, doing.]

Ides, īdz, n.sing. in ancient Rome, the 15th day of March, May, July, October, and the 13th of the other months. [Fr.,—L. idus, prob. Etruscan.]

Idiocrasy, id-i-ok′ra-si, n. same as Idiosyncrasy.—adj. Idiocrat′ic.

Idiocy. See Idiot.

Idioelectric, id-i-o-e-lek′trik, adj. electric by virtue of its own peculiar properties.

Idiograph, id′i-o-graf, n. a private mark or trademark.—adj. Idiograph′ic.

Idiom, id′i-um, n. a mode of expression peculiar to a language, a peculiar variation of any language, a dialect.—n. Id′iasm, a peculiarity.—adjs. Idiomat′ic, -al, conformed or pertaining to the idioms of a language.—adv. Idiomat′ically.—n. Idiot′icon, a vocabulary of a particular dialect or district. [Fr.,—L.,—Gr. idiōma, peculiarity—idios, one's own.]

Idiomorphic, id-i-o-mor′fik, adj. having a peculiar or distinctive form.

Idiopathy, id-i-op′a-thi, n. a peculiar affection or state: (med.) a primary disease, one not occasioned by another.—adj. Idiopath′ic (med.), primary, not depending on or preceded by another disease.—adv. Idiopath′ically. [Gr. idios, peculiar, pathos, suffering—pathein to suffer.]