An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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chemical composition
  همنهش ِ شیمیک  
hamneheš-e šimik
Fr.: composition chimique  

The identities, and relative abundances of the → chemical elements or → compounds that make up a substance.

See also: → chemical; → composition.