I*rid"o*line(?), n. [Iridescent + L. oleum oil.] (Chem.) A nitrogenous base C10H9N, extracted from coal-tar naphtha, as an oily liquid. It is a member of the quinoline series, and is probably identical with lepidine.
Ir`i*dos"mi*um(?), } n. [Iridium + osmium.] (Min.) The native compound of iridium and osmium. It is found in flattened metallic grains of extreme hardness, and is often used for pointing gold pens.
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Thu 13th December 2018