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orzo
OS
Os
os (1)
os (2)
OSA
Osage (1)
Osage (2)
Osage orange
Osaka
Oscan
Oscar (1)
Oscar (2)
OSCE
oscillate
oscillating universe
oscillogram
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osculum
os·cu·lum [ óskyələm ] (plural os·cu·la [ óskyələ ])


noun 
Definition:
 
opening like mouth: an opening like a mouth, through which a sponge expels water
[Early 17th century. Via modern Latin< Latin, "little mouth, kiss" < os "mouth"]
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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