Humphry Osmond, psychiatrist

Humphry Osmond, psychiatrist, is identified in the book chiefly through a consequential act of naming: in 1956, he coined the term “psychedelic” for drugs such as LSD and psilocybin that produce radical changes in consciousness. The word gives a concise frame to a field concerned not only with drugs, but with how consciousness can change and how those changes may be understood in therapy.

Coining a Name

The glossary derives “psychedelic” from the Greek for “mind manifesting” and credits Humphry Osmond, psychiatrist, with introducing it in 1956. Its definition encompasses LSD and psilocybin, emphasizing the radical alteration of consciousness associated with them. In the book’s account, this coinage supplies a vocabulary for experiences that earlier psychiatric terms described differently.

A Changing Psychiatric Vocabulary

The glossary also defines “psychotomimetic,” a term commonly used for LSD and similar drugs when they first entered psychiatry in the 1950s. Researchers then believed these substances produced temporary psychoses that might illuminate mental illness and let therapists experience madness firsthand. It distinguishes this from “psycholytic,” a term coined in the 1960s for drugs or doses that loosen mental constraints and allow subconscious material into awareness, as well as for low-dose psychotherapy intended to relax rather than obliterate the ego. Against these definitions, Osmond’s coinage marks a different emphasis: the mind made manifest, rather than an experience understood primarily as a temporary imitation of psychosis or a loosening of mental constraints.

Place in the Book’s Account

The book’s index associates Humphry Osmond, psychiatrist, with the psychedelic therapy paradigm and separately lists his ambitions. The material provided does not elaborate those ambitions or detail his therapeutic work, so his documented significance here rests on the term itself and the interpretive frame it made available. The word continues to name a broad class of consciousness-altering drugs, linking the book’s discussion of psychiatric history to its account of psychedelic experience.