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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 . It is frequently encountered in science and electronics for prefixing units of time and length. Examples: *One nanometer is about the length that a fingernail grows in one second. *Three gold atoms lined up are about one nanometer long. *If a toy marble were scaled down to one nanometer wide, Earth would scale to about one meter (3.3 feet) wide.〔http://www.nano.gov/nanotech-101/what/nano-size〕 The prefix is derived from the Greek , meaning "dwarf", and was officially confirmed as standard in 1960. When used as a prefix for something other than a unit of measure (as in "nanoscience"), nano refers to nanotechnology, or on a scale of nanometres. See nanoscopic scale. == References == simple:Nano- 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nano-」の詳細全文を読む スポンサード リンク
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