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oogenesis
oogonium
ooh
Ookpik
oolite
oolong
oom
oompah
oomph
oomycete
oophorectomy
oophoritis
oops
Oort cloud
oose
oosphere
oospore
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OP
OP


abbr 
Definition:
 
1. military observation post
2. chemistry organophosphate
3. publishing out of print
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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