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orthophosphate
orthophosphoric acid
orthopsychiatry
orthopteran
orthopterous
orthoptics
orthopyroxene
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os (2)
os [ oss ] (plural os·sa [ óssə ])


noun 
Definition:
 
anatomy  ( technical )
Same as  bone
[Mid-16th century. < Latin, "bone" (stem oss-)]
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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