Étienne Félix d'Henin de Cuvillers

Étienne Félix d'Henin de Cuvillers (1755–1841) was a French magnetizer and an early practitioner of mesmerism as a scientific discipline.

Hénin de Cuvillers was a follower of Franz Anton Mesmer (1734–1815).

However, unlike Mesmer he did not believe in the existence of a "magnetic fluid" in animal magnetism, and instead emphasized the role of mental processes in mesmerism.

In his book Le magnétisme éclairé (The Enlightened Magnetism), he describes accounts of mesmeric effects in terms of belief and suggestibility.

[2] He is credited for popularizing a system of scientific nomenclature by using the prefix "hypn" in words such as hypnotique (hypnotic), hypnotisme (hypnotism) and hypnotiste (hypnotist).