One of many terms for out-of-the-body travel, also known
as OOB, astral projection, or etheric projection. The term ecsomatic
is used by parapsychologist Celia E. Green, director of
the Institute of Psychophysical Research, Oxford, England,
in conjunction with related technical terms, including parasomatic
(in which the percipient appears to have another body as
distinct from the normal physical body) and asomatic (in which
the subject is unaware of having a body).
Green, Celia E. Out-of-the-body Experiences. Proceedings of
the Institute of Psychophysical Research, vol. 2. London, 1968.