Definition of agrypnotic in English:

agrypnotic

noun

Medicine
  • A drug or treatment administered to produce wakefulness or prevent sleep; an antihypnotic; a stimulant.

adjective

Medicine
  • Producing wakefulness or sleeplessness; antihypnotic; acting as a stimulant.

Origin

Mid 19th century. From agrypn- + -otic, after hypnotic [noun].

Pronunciation

agrypnotic

/ˌaɡrɪpˈnɒtɪk/