An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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sidero-
  آهن-، سیدرو-  
âhan-, sidero-
Fr.: sidéro  

A combining form meaning “iron,” used in the formation of compound words; variant sider- before a vowel.

Etymology (EN): From Gk. sideros “iron.”

Etymology (PE): Âhan-, from âhan, → iron.
Sidero-, loan from Gk., as above.