{ O″cher, O″chre } (?), n. [F. ocre, L. ochra, fr. Gr. �, from (�) pale, pale yellow.] (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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.