rontogram

名词 n.

英文释义

名词 n.
  1. An SI unit of mass equal to 10⁻²⁷ grams. Symbol: rg
    — 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.

词形变化

rontograms plural rontogramme alternative,UK

词源

From ronto- + gram.
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