'Raw sienna' definitions:

Definition of 'raw sienna'

(from WordNet)
noun
A medium to dark tan color [syn: yellowish brown, raw sienna, buff, caramel, caramel brown]
noun
A yellowish-brown pigment made from untreated sienna

Definition of 'Raw 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]