Pyrargyrite

Py*rar"gy*rite

(?), n. [Gr. fire + silver.] (Min.) Ruby silver; dark red silver ore. It is a sulphide of antimony and silver, occurring in rhombohedral crystals or massive, and is of a dark red or black color with a metallic adamantine luster.
[1913 Webster]

{

Pyr"a*zine

(?), n. Also

-zin

}. [Pyridine + Gr. not + life.] (Org. Chem.) A feebly basic solid, C4H4N2, obtained by distilling piperazine with zinc dust, and in other ways. Also, by extension, any of various derivatives of the same.
[Webster 1913 Suppl.]

 

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Thu 13th December 2018