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Atto-
Atto- (symbol a) is a unit prefix in the metric system denoting a factor of 10−18 or . The unit multiple was adopted at the 12th General Conference on Weights and Measures (CGPM) in Resolution 8. It is derived from the Danish word ''atten'', meaning "eighteen". Examples of its use: * Weight of the HIV-1 virus is about 1 x 10−18 kg or 1 x 10−15 g, which can be written as 1 fg or 1000 ag. * More examples available. ==References==
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「Atto-」の詳細全文を読む
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