Jisho

×
Prefix
1. zepto-; 10^-21
Wikipedia definition
2. Zepto-Zepto- (symbol z) is a prefix in the metric system denoting a factor of 10 or 0.000000000000000000001. Adopted in 1991, it comes from the French sept or Latin septem, meaning "seven", since it is equal to 1000. Examples of its use: The charge on one electron: 160 zeptocoulombs (zC). One zeptomole (zmol) of substance contains 602 particles.
Read “Zepto-” on English Wikipedia
Read “ゼプト” on Japanese Wikipedia
Read “Zepto-” on DBpedia

Discussions

to talk about this word.