'Sienna' definitions:
Definition of 'sienna'
From: WordNet
noun
An earth color containing ferric oxides; used as a pigment
Definition of 'Sienna'
From: GCIDE
- Sienna \Si*en"na\, n. [It. terra di Siena, fr. Siena in Italy.] (Chem.) 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. [1913 Webster]
- Burnt sienna, sienna made of a much redder color by the action of fire.
- Raw sienna, sienna in its natural state, of a transparent yellowish brown color. [1913 Webster]