Os Definition
 ōs 
  os, ora, osar, ossa
  
    noun
  
 Webster's New World 
A bone.
 Webster's New World 
A mouth; opening.
 Webster's New World 
Synonyms: 
  
- atomic number 76
- osmium
- operating system
- oculus sinister
- bone
    abbreviation
  
 Old Saxon.
 Webster's New World 
Old Style.
 Webster's New World 
Old series.
 Webster's New World 
Operating system.
 Webster's New World 
Ordinary Seaman.
 Webster's New World 
    symbol
  
 Osmium.
 Webster's New World 
Origin of Os
-  From neuter Latin word os with the genitive oris (meaning "mouth"). From Wiktionary 
-  From neuter Latin word os (genitive ossis) meaning "bone". From Wiktionary 
-  Latin ōs mouth ōs- in Indo-European roots From American Heritage Dictionary of the English Language, 5th Edition 
-  Latin bone ost- in Indo-European roots From American Heritage Dictionary of the English Language, 5th Edition 
-  From Latin os (“bone”) From Wiktionary 
-   From Wiktionary 





