- See under sienna(def 1).
Origin of raw sienna
- a ferruginous earth used as a yellowish-brown pigment (raw sienna) or, after roasting in a furnace, as a reddish-brown pigment (burnt sienna).
- the color of such a pigment.
Origin of sienna
- a natural earth containing ferric oxide used as a yellowish-brown pigment when untreated (raw sienna) or a reddish-brown pigment when roasted (burnt sienna)
- the colour of this pigmentSee also burnt sienna
Word Origin for sienna
city in central Italy, probably from Senones, the name of a Gaulish people who settled there in ancient times. Related: Sienese. The brownish-ochre color (1760) is from Italian terra di Sienna "earth of Siena," where the coloring material first was produced.