twilight sleep: Meaning and Definition of

twi'light sleep"

Pronunciation: [key]
— Med. Med.
  1. a state of semiconsciousness, usually produced by hypodermic injections of scopolamine and morphine, used chiefly to effect relatively painless childbirth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.