名詞
An SI unit of mass equal to 10⁻³⁰ grams. Symbol: qg
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その他の例文 (1)
The arrival of the new prefixes means the Earth can now be said to weigh six ronnagrams, and Jupiter about two quettagrams. An electron weighs about a rontogram, and a single bit of data stored on a mobile phone adds about 10 quectograms to its mass.