Iridium
A Dictionary of Scientific Terms · 1927 · p. 3
A metallic element. Symbol: Ir.
Bu kavram başka kaynaklarda da geçiyor
French-English Dictionary of Military Terms (1918)
French-English and English-French Commercial Dictionary (1918)
Chamber's Twientieth Century Dictionary (1908)
Nuttall Encyclopedia (1907)
Chandler's Encyclopedia (1898)
A Dictionary of Arts, Manufactures and Mines (1840)
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