1. plural of sienna; earth pigments containing iron oxide, used in painting, ranging from yellowish-brown (raw sienna) to reddish-brown (burnt sienna)

Examples

• The artist mixed various siennas to create the perfect autumn landscape.
• Raw and burnt siennas are essential colors in any painter’s palette.
• The pottery was glazed with rich siennas and umbers.
• She preferred using natural siennas over synthetic brown pigments.
• The art supply store carried several grades of siennas from different regions.
• Traditional oil painters often rely on siennas for warm earth tones.