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raw sienna

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noun
  1. See under sienna(def 1).
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Origin of raw sienna

First recorded in 1885–90

sienna

[see-en-uh]
noun
  1. a ferruginous earth used as a yellowish-brown pigment (raw sienna) or, after roasting in a furnace, as a reddish-brown pigment (burnt sienna).
  2. the color of such a pigment.
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Origin of sienna

1750–60; < Italian (terra di) Sien(n)a (earth of) Siena
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for raw sienna

sienna

noun
  1. a natural earth containing ferric oxide used as a yellowish-brown pigment when untreated (raw sienna) or a reddish-brown pigment when roasted (burnt sienna)
  2. the colour of this pigmentSee also burnt sienna
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Word Origin

C18: from Italian terra di Siena earth of Siena
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for raw sienna

Sienna

city in central Italy, probably from Senones, the name of a Gaulish people who settled there in ancient times. Related: Sienese. The brownish-ochre color (1760) is from Italian terra di Sienna "earth of Siena," where the coloring material first was produced.

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Online Etymology Dictionary, © 2010 Douglas Harper