si|en|na

si|en|na «see EHN uh», noun.

1. any one of various mixtures of clay and oxides of iron and manganese, used as a pigment. In its natural state it is yellowish-brown (raw sienna). After heating, it becomes reddish-brown (burnt sienna).

2. a yellowish brown or reddish brown.

╂[< Italian sienna short for terra di Sienna earth from Siena, a city in Italy]