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obturator
obtuse
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obverse
obversion
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obviously
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obstructive sleep apnea
ob·struc·tive sleep ap·ne·a


noun 
Definition:
 
stopping of breathing while asleep: cessation or restriction of breathing during sleep that results in loud snoring
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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