| 单词 | o sign | 
| 释义 | > as lemmasO sign   O sign  n. Medicine slang (originally and chiefly U.S.) the persistently gaping, open mouth of a patient who is asleep, or (more commonly) in a coma, dying, or dead (frequently euphemistic). ΚΠ 1980    E. Morgan Making of Woman Surgeon 137  				The ‘O’ sign means you lie with your mouth open so wide that a fly can buzz in and out and never get wet. 1988    Chicago Tribune 		(Nexis)	 11 Dec. 12  				‘Positive O sign’ referring to the open mouth of a corpse. 2001    N.Y. Times (Week in Review section) 7/3  				He's resting comfortably; positive O sign. < as lemmas  | 
	
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