O sign
Also found in: Idioms.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
O sign
Medtalk The open-mouthed slack-jawed appearance of the narcotized, unconscious, stuporose, and dead-drunk. Cf Q sign.McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.