king-yellow

king's yellow

noun Chemistry.
See under arsenic trisulfide.
Dictionary.com Unabridged

arsenic trisulfide

noun Chemistry.
a yellow or red crystalline substance, As 2 S 3 , occurring in nature as the mineral orpiment, and used as a pigment (king's yellow) and in pyrotechnics.

Origin:
1905–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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