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WordReference Random House Unabridged Dictionary of American English © 2024au•re•o•lin (ô rē′ə lin, ə rē′-),USA pronunciation n. - Fine Arta pigment used in painting, consisting of potassium cobaltinitrite and characterized by its brilliant yellow hue, transparency, and permanence. Also called cobalt yellow.
- Latin aureol(us) golden, of gold (see aureole) + -in2
- 1875–80;
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