A plant (not identified) having narcotic properties, mentioned by Pliny. Obsolete.

Any of several hallucinogenic fungi, esp. Psilocybe mexicana, found in Central America. Also attributive.

A tropical American morning glory, Turbina corymbosa (family Convolvulaceae). Also: a psychoactive drug prepared from the seeds of this plant, used…

The leaves and twigs of the shrub khat, Catha edulis, which contain a stimulant drug; (also) the shrub itself. See khat, n.

spec. A mushroom with hallucinogenic properties. Cf. magic mushroom n. at magic, adj. compounds.

any of several types of mushroom with hallucinogenic properties, esp. one containing psilocybin; frequently in plural.