From The Collaborative International Dictionary of English v.0.48:

Ocher \O"cher\, Ochre \O"chre\, n. [F. ocre, L. ochra, fr. Gr.
   ?, from (?) pale, pale yellow.]
   1. (Min.)
      (a) A impure earthy ore of iron or a ferruginous clay,
          usually red (hematite) or yellow (limonite), -- used
          as a pigment in making paints, etc. The name is also
          applied to clays of other colors.
      (b) A metallic oxide occurring in earthy form; as,
          tungstic ocher or tungstite.
          [1913 Webster]

   2. The color of ocher[1], varying around orange, from more
      yellowish to more reddish in tint.
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