Zeptosecond Definition
zĕptō-sĕkənd
noun
One sextillionth (10−21 ) of a second.
American Heritage
Other Word Forms of Zeptosecond
Noun
Singular:
zeptosecond
Plural:
zeptosecondsOrigin of Zeptosecond
-
zepto- +"Ž second
From Wiktionary
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