A drug or other agent that causes delirium. Cf. deliriant, n.

A drug or other agent that causes delirium. Cf. delirifacient, n.

Medicine. A drug or other agent that causes delirium (see delirium, n. 1); a deliriant or delirifacient. rare.

Something that expands or (apparently) extends the capabilities of the mind; spec. a psychedelic drug. Also: a person who takes ‘mind-expanding’…

(a) a person who changes his or her mind; (b) a psychedelic drug.

With plural agreement. Hallucinogenic drugs. Also occasionally with singular agreement.

A drug which causes hallucinations (see hallucination, n. 2).

A drug that induces hallucinations.

A hallucinogen which induces fantasies or visions of a perfect existence; a drug whose effects are viewed as an escape from or improvement upon…

spec. A psychedelic drug.