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The Collaborative International Dictionary

Deliriant \De*lir"i*ant\, n. [See Delirium.] (Med.) A poison which occasions a persistent delirium, or mental aberration (as belladonna).


n. that which induces a medical state of frank delirium, usually in reference to a drug.


Deliriants are a class of hallucinogen. The term was introduced by David F. Duncan and Robert S. Gold to distinguish these drugs from psychedelics and dissociatives, such as LSD and ketamine respectively, due to their primary effect of causing delirium, as opposed to the more lucid states produced by other hallucinogens (psychedelics and dissociatives). The term is generally used to refer to anticholinergic drugs.

Usage examples of "deliriant".

Sweating excessively Softly undid the belts on his leather briefcase, lifted the worn flap and began sifting among bottles, tubes and packets of stimulants, re-laxants, euphoriants, deliriants, sedative-hypnotics, local anesthetics and animal tranquilizers.

He lifted the briefcase onto his lap and felt around inside for the old glue bottle that contained his most extreme deliriant, a sudsy composite of lighter fluid, paint thinner, airplane glue, nail polish remover and several types of aerosol propellant.