DICT.TW Dictionary Taiwan

 Si·en·na n.  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.
 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.
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 raw sienna
      n 1: a medium to dark tan color [syn: yellowish brown, buff,
           caramel, caramel brown]
      2: a yellowish-brown pigment made from untreated sienna