A term used by Russian parapsychologists to indicate a theoretical energy field counterpart of the human body, involved in extrasensory perception and psychokinetic phenomena. Such a concept has some affinity with the astral body spoken of by Theosophists.
Ostrander, Sheila, and Lynn Schroeder. Psychic Discoveries behind the Iron Curtain. 1970. Reprint, New York: Bantam Books, 1971.