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zeolite
Zepa
Zephaniah
zephyr
zephyr lily
Zephyrus
zeppelin
zepto-
zeptosecond
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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
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