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- DictionaryNano-/ˈnanō/
combining form
- 1. denoting a factor of 10−9 (used commonly in units of measurement): "nanosecond"
combining form
Prefix denoting 10 to the −9th power
Nano (symbol n) is a unit prefix meaning one billionth. Used primarily with the metric system, this prefix denotes a factor of 10 −9 or 0.000000001. It is frequently encountered in science and electronics for prefixing units of time and length. Wikipedia