siderite Meaning, Definition & Usage

  1. noun iron ore in the form of ferrous carbonate
    chalybite.
  2. noun a meteorite consisting principally of nickel and iron

WordNet

Sid"er*ite noun
Etymology
L. sideritis loadstone, Gr. , , of iron, from iron.
Definitions
  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. (b) A meteorite consisting solely of metallic iron. (c) An indigo-blue variety of quartz. (d) Formerly, magnetic iron ore, or loadstone.
  2. (Bot.) Any plant of the genus Sideritis; ironwort.

Webster 1913