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zerofill
zeroize
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zest
zester
zeta
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zeptosecond
zep·to·sec·ond [ zéptō sèkənd ] (plural zep·to·sec·onds)


noun 
Definition:
 
one-sextillionth of second: a unit of time equal to one-sextillionth of a second
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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