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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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ornithischian
ornitho-
ornithology
ornithomancy
ornithophily
ornithopod
ornithopter
ornithosis
oro-
orogenesis
orogenic
orogenic belt
orogeny
orography
oroide
orology
OROM
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oro-
oro-


prefix 
Definition:
 
mountain
orography
[< Greek oros]
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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