| 单词 | per os | 
| 释义 | Definition of per os in English:per osadverb pər ˈəʊs Biology Medicine 
 OriginMid 19th century; earliest use found in The Lancet. From classical Latin per ōs (in a medical context in Varro) from classical Latin per + ōs mouth. Definition of per os in US English:per osadverbpər ˈəʊs Biology Medicine 
 OriginMid 19th century; earliest use found in The Lancet. From classical Latin per ōs (in a medical context in Varro) from classical Latin per + ōs mouth.  | 
	
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