Ocher; Ochre

Part of speech: noun (n.)

1. 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.

2. A metallic oxide occurring in earthy form; as, tungstic ocher or tungstite.