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side-straddle hop
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sidereal hour
si·de·re·al hour (plural si·de·re·al hours)


noun 
Definition:
 
24th of sidereal day: a 24th part of a sidereal day
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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