The Collaborative International Dictionary
Antihypnotic
Antihypnotic \An`ti*hyp*not"ic\, a. (Med.) Tending to prevent sleep. -- n. An antihypnotic agent.
Wiktionary
antihypnotic
a. (context medicine English) Tending to prevent sleep. n. Any agent that prevents sleep.
Usage examples of "antihypnotic".
But you'll remember," Dasinger said, "that I had a little trouble getting close to you with an antihypnotic.