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.

sienna

A naturally occurring pigment, chiefly oxides of iron; yellow-brown when mined. When calcined, a dark, rich color; then called burnt sienna.

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
References in periodicals archive ?
Sienna drivers notice the considerable heft of the vehicle, since weight shifts from side to side and from one corner to another as the vehicle travels through curves and turns.
Amplifying that, he remarks, "The Sienna seat-set was one of a handful of critical features where we said, 'Damn the cost, let's make it the best we can--and find a way to offset the extravagance along the way.
The location of the rear-track assembly on the '04 Sienna looks significantly better than on the '03--because you don't notice it unless you're looking for it.
Another way costs were reduced was through the off-line processing of the Sienna headliner.
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.