Jisho

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Prefix
1. nano-; 10^-9
Wikipedia definition
2. Nano-Nano- (symbol n) is a prefix meaning a billionth. Used primarily in the metric system, this prefix denotes a factor of 10 or 0.000000001. It is frequently encountered in science and electronics for prefixing units of time and length, such as 30 nanoseconds (symbol ns), 100 nanometres (nm) or in the case of electrical capacitance, 100 nanofarads (nF). The prefix is derived from the Greek νᾶνος, meaning "dwarf", and was officially confirmed as standard in 1960.
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Read “Nano-” on DBpedia

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