Sid"er*ite, n. [L. sideritis loadstone, Gr. , , of iron, from iron.]

1. Min. (a)

Carbonate of iron, an important ore of iron occuring generally in cleavable masses, but also in rhombohedral crystals. It is of a light yellowish brown color. Called also sparry iron, spathic iron.


A meteorite consisting solely of metallic iron.


An indigo-blue variety of quartz.


Formerly, magnetic iron ore, or loadstone.

2. Bot.

Any plant of the genus Sideritis; ironwort.


© Webster 1913.

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