Metagnomy is a term used by French psychical researchers to indicate knowledge acquired through cryptesthesia, i.e., without the use of the five senses.

Although this term was employed by the French psychical researcher Dr. Eugen Osty, it seems to have been originally coined by the researcher Emile Boirac (1851-1917) in his book¬†L’ Avenir des Sciences Psychiques¬†(Paris, 1917), and was ascribed in Dr. Osty’s work¬†Supernatural Faculties in Man¬†(London, 1923).

The term was derived from the Greek words¬†meta¬†(after) and¬†gnomon¬†(knower), and is used to indicate the phenomenon of supernatural cognition, now generally referred to as¬†“extrasensory perception”¬†by parapsychologists.¬†A.G.H.

Source: 9.