The Collaborative International Dictionary of English v.0.48:

Limonite \Li"mon*ite\ (l[imac]"m[o^]n*[imac]t), n. [Gr. leimw`n
   any moist grassy place, a meadow: cf. F. limonite, G.
   limonit.] (Min.)
   Hydrous sesquioxide of iron, an important ore of iron,
   occurring in stalactitic, mammillary, or earthy forms, of a
   dark brown color, and yellowish brown powder. It includes bog
   iron. Also called brown hematite.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Brown \Brown\ (broun), a. [Compar. Browner; superl.
   Brownest.] [OE. brun, broun, AS. br?n; akin to D. bruin,
   OHG. br?n, Icel. br?nn, Sw. brun, Dan. bruun, G. braun, Lith.
   brunas, Skr. babhru. [root]93, 253. Cf. Bruin, Beaver,
   Burnish, Brunette.]
   Of a dark color, of various shades between black and red or
   yellow.
   [1913 Webster]

         Cheeks brown as the oak leaves.          --Longfellow.
   [1913 Webster]

   Brown Bess, the old regulation flintlock smoothbore musket,
      with bronzed barrel, formerly used in the British army.

   Brown bread
   (a) Dark colored bread; esp. a kind made of unbolted wheat
       flour, sometimes called in the United States Graham
       bread. "He would mouth with a beggar though she smelt
       brown bread and garlic." --Shak.
   (b) Dark colored bread made of rye meal and Indian meal, or
       of wheat and rye or Indian; rye and Indian bread. [U.S.]


   Brown coal, wood coal. See Lignite.

   Brown hematite or Brown iron ore (Min.), the hydrous iron
      oxide, limonite, which has a brown streak. See Limonite.


   Brown holland. See under Holland.

   Brown paper, dark colored paper, esp. coarse wrapping
      paper, made of unbleached materials.

   Brown spar (Min.), a ferruginous variety of dolomite, in
      part identical with ankerite.

   Brown stone. See Brownstone.

   Brown stout, a strong kind of porter or malt liquor.

   Brown study, a state of mental abstraction or serious
      reverie. --W. Irving.
      [1913 Webster]