Definition of psycholeptic in US English:

psycholeptic

adjective

  • Designating a psychoactive drug that has a depressant effect on mental activity, such as a sedative, tranquillizer, hypnotic, or anxiolytic.

noun

  • A psycholeptic drug.

Origin

Late 19th century (in an earlier sense). From psycho- + -leptic. In sense A. 1 after psycholepsy; in psycholeptic crisis after French crise de psycholepsie.

Pronunciation

psycholeptic

/ˌsʌɪkə(ʊ)ˈlɛptɪk/