sienna

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sienna:

see ocherocher
, mixture of varying proportions of iron oxide and clay, used as a pigment. It occurs naturally as yellow ocher (yellow or yellow-brown in color), the iron oxide being limonite, or as red ocher, the iron oxide being hematite.
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sienna

[sī′en·ə]
(materials)
Any of various yellowish-brown earthy substances consisting of hydrated iron oxide occurring in limonite; becomes orange-brown when burnt and is generally darker and more transparent in oils than is ocher; used as pigment for oil paints and stains.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sienna

A naturally occurring pigment, chiefly oxides of iron; yellow-brown when mined. When calcined, a dark, rich color; then called burnt sienna.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

sienna

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 pigment
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
The Sienna's V-6 was surprisingly quick to respond to pressure on the accelerator pedal and, with the transmission, delivered power smoothly.
Hollyoaks' Sienna killed by daughter Nico as flash-forward comes true - but stunned fans refuse to believe she's really dead
"Having seen the devastation Nico has caused, particularly to Ben and his son Josh, Sienna had no
"No matter what, Nico is her daughter and Sienna knows the best thing for her is to be apprehended,
In the previous-generation Sienna, the rear sliding door track assembly was positioned in the middle of the rear quarter panel.
Another way costs were reduced was through the off-line processing of the Sienna headliner.
* Reduced prototype tooling costs (some parts went straight to production tooling without any prototype tooling--this was not only made possible by the digital Delmia software, but also physical rapid prototyping, with, for example, a Quantum fused deposition molding machine from Stratasys for such things as modeling the all-important cup holders, of which there are 10 in the Sienna)
The Sienna can be configured as a seven- (standard) or eight-passenger vehicle (with two people in the front, two or three in the middle row, and three in the third row).
The '04 Sienna is simply the kind of minivan that Toyota should have had all along.
For the XLE Limited, there is a laser-based dynamic cruise control system that scans the horizon in front of the vehicle and can slow the Sienna in case another vehicle enters a preset perimeter via adjusting the electronic throttle control, brakes, and the transmission (starting with the throttle).