Si-ēn'nā, n.

n. [It. terra di Sienna; from Sienna, in Italy.] An earthy pigment of a brownish-yellow color: it is a silicate of iron and alumina;—called also terra sienna.

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.