ideoplasmn.

1910 Atlantic Monthly Oct. 478/2 There is a whole universe of supra-sensible phenomena,..a world of magnetic fields and electric waves, a world of ultra-violet rays, of radio-active forces, of ions and electrons, of ideoplasm and entelechies, a world which eye has not seen, nor ear heard.

1926 A. Conan Doyle Hist. Spiritualism I. i. 7 Ectoplasm..has also been called ‘ideoplasm’, because it takes on in an instant any shape with which it is impressed by the spirit.

1984 Times 15 Mar. 12/5 Like Richet, [Schrenck-Notzing] was a materialist. Ectoplasm, he surmised, was ‘ideoplasm’: matter being moulded into forms by the medium's imagination.

1961 W. H. Salter Zoar vi. 69 A clumsy attempt, whether ideoplasmic or fraudulent, to imitate the established conception of a spirit?

1961 W. H. Salter Zoar vi. 63 The hypothesis of ‘ideoplasmy’, that is to say, the view that materialisations are produced from the medium's energy and a substance (‘ectoplasm’) supplied by him with the assistance perhaps of the sitters, and that they take form in accordance with the thoughts of those present.