Definition of psycholeptic in English:

psycholeptic

Pronunciation /ˌsʌɪkə(ʊ)ˈlɛptɪk/

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.