tarnish

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tarnish

Surface discoloration or reduced luster of metals owing to the effect of corrosive substances or galvanic action. In dental restorations, such action may be enhanced by accumulation of bacterial plaque.

tarnish,

n 1. surface discoloration or loss of luster by metals. Under oral conditions, it often results from hard and soft deposits.
2. a chemical process by which a metal surface is discolored or its luster destroyed.
References in periodicals archive ?
Tarnished does offer suggestions for those sentenced to work with toxic leaders, but Reed has the candor to admit that these suggestions may not work.
In the context of a Fed that has become highly influential and visible, The Tarnished Fed takes on even greater relevance.
If the brass were tarnished one would suspect the answer is "yes.
Evaluation of the solderability of tarnished PCB lots can be determined by testing to J-STD-003B.
08) began "The Tees Valley has had some pretty tarnished skin to shed but, as the remnants of old Teesside fade away, a new one has emerged - vibrant, energised and confident".
a little tarnished, jovial but not quite respectable.
I'm broke, I'm homeless, and my reputation has been severely tarnished,'' Sizemore opines.
That Thomas' reputation is tarnished, but we don't know why?
With winter just around the corner there is no relief in sight from the high oil prices that have consumed media attention and tarnished the carefree days of summer.
Oud counted him as a friend, was shabbily treated by the magazine, and tried to forgive: his shining honour leaves Hegemann's tarnished.
With enough references to the original strip to keep things moving along swiftly, Dog Sees God is a fun romp for anyone who doesn't mind seeing their beloved "Peanuts" characters tarnished by alcohol, sex, and violence.
As you know, since the 9/11 events the image of Islam has been tarnished in the West.