Preventing sleep; causing wakefulness; insomniac.
2. noun
A medication that prevents sleep.

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  • Agrypnotic — Ag ryp*not ic, n. [Gr. ? sleepless; ? to chase, search for + ? sleep: cf. F. agrypnotique.] Anything which prevents sleep, or produces wakefulness, as strong tea or coffee. [1913 Webster] || …   The Collaborative International Dictionary of English

  • agrypnotic — agryp·not·ic (ă″grip notґik) [Gr. agrypnos sleepless] 1. promoting wakefulness. 2. an agent that promotes wakefulness …   Medical dictionary

  • agrypnotic — adjective of or pertaining to agrypnia • Pertains to noun: ↑agrypnia • Derivationally related forms: ↑agrypnia …   Useful english dictionary

  • agrypnia —   n. sleeplessness.    ♦ agrypnotic, n. & a. (stimulant) causing wakefulness …   Dictionary of difficult words

  • agrypnia — noun a vigil before certain feasts (as e.g. Easter) • Derivationally related forms: ↑agrypnotic • Hypernyms: ↑vigil, ↑watch …   Useful english dictionary