from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An ore of iron, FeCO3.
  • n. A meteorite consisting mainly of iron and nickel.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a widespread brown mineral, FeCO3, having the structure of calcite
  • n. an iron meteorite
  • n. An indigo-blue variety of quartz.
  • n. magnetic iron ore; lodestone

from the GNU version of the Collaborative International Dictionary of English

  • n.
  • n. 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.
  • n. A meteorite consisting solely of metallic iron.
  • n. An indigo-blue variety of quartz.
  • n. Formerly, magnetic iron ore, or loadstone.
  • n. Any plant of the genus Sideritis; ironwort.

from The Century Dictionary and Cyclopedia

  • n. The lodestone.
  • n. Native iron protocarbonate, a mineral of a yellowish or brownish color, crystallizing in the rhombohedral system with perfect rhombohedral cleavage.
  • n. A meteorite consisting essentially of nickeliferous metallic iron. See meteorite.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. iron ore in the form of ferrous carbonate
  • n. a meteorite consisting principally of nickel and iron


Latin sideritis ("lodestone"), from Ancient Greek, of iron, from iron. (Wiktionary)



Log in or sign up to get involved in the conversation. It's quick and easy.