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orthoscopic
orthostatic
orthotics
orthotropic
orthotropous
orthovoltage
orthovoltage therapy
ortolan
ORV
Orvieto
-ory
oryx
orzo
OS
Os
os (1)
os (2)
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Oscar (2)
Os·car [ óskər ]


noun 
Definition:
 
code word for letter "O": a code word for the letter "O," used in international radio communications
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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