siderite

2 definitions found

siderite - Collaborative International Dictionary of English v.0.48 :

  Siderite \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
            .
        (b) A meteorite consisting solely of metallic iron.
        (c) An indigo-blue variety of quartz.
        (d) Formerly, magnetic iron ore, or loadstone.
            [1913 Webster]
  
     2. (Bot.) Any plant of the genus Sideritis; ironwort.
        [1913 Webster] Siderographic

siderite - WordNet (r) 2.1 (2005) :

  siderite
      n 1: iron ore in the form of ferrous carbonate [syn: siderite,
           chalybite]
      2: a meteorite consisting principally of nickel and iron