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Definition of sienna noun from the Oxford Advanced Learner's Dictionary

sienna

noun
 
/siˈenə/
 
/siˈenə/
[uncountable]
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  1. a type of dark yellow or red clay used for giving colour to paints, etc.; a dark yellow or red colour
    • Burnt sienna, with its rich luminous red, makes an ideal colour for adding warmth to natural brick.
    Word Originlate 18th cent.: from Italian (terra di) Sienna ‘(earth of) Siena’.
See sienna in the Oxford Advanced American Dictionary

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