Definition for IS'ER-IN, or IS'ER-INE

IS'ER-IN, or IS'ER-INE, n. [G. eisen, iron.]

A mineral of an iron black color, and of a splendent metallic luster, occurring in small obtuse angular grains. It is harder than feldspar, and consists of the oxyds of iron and titanium, with a small portion of uranium. Ure.

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