Sienna

[si'enә]

(noun.) an earth color containing ferric oxides; used as a pigment.

Checked by Harlan--From WordNet

(n.) Clay that is colored red or brown by the oxides of iron or manganese, and used as a pigment. It is used either in the raw state or burnt.

Typed by Annette

n. a fine orange-red pigment used in oil and water-colour painting.

Checked by Conan