si·en·na 
(sē-ĕnə)
(sē-ĕnə)n.
1. A special clay containing iron and manganese oxides, used as a pigment for oil and watercolor painting.
2.
a. Raw sienna.
b. Burnt sienna.
[Short for terra-sienna, from Italian terra di Sienna, earth of Siena, after Siena.]
- scandia
- Scandia
- Scandian
- scandic
- Scandinavia
- Scandinavian
- Scandinavian Peninsula
- scandium
- scandium oxide
- scannable
- scanner
- scanning electron microscope
- scanning force microscope
- scanning probe microscope
- scanning tunneling microscope
- scansion
- scansorial
- scant
- scantily
- scantiness
- scantling
- scantly
- scantness
- scanty
- Scapa Flow