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semiaquatic
semiarid
semiautobiographical
semiautomatic
semiautonomous
semibold
semibreve
semibreve rest
semicentennial
semicircle
semicircular canal
semiclassical
semicolon
semicoma
semicomatose
semiconductor
semiconductor diode
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semidiurnal
sem·i·di·ur·nal [ sèmmee dī úrn'l, sèmmī dī úrn'l ]


adjective 
Definition:
 
1. lasting one-half day: continuing or happening over half a day
2. occurring at 12-hour intervals: happening approximately once every twelve hours
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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