oil yellow


Definition of oil yellow

  1. 1 often capitalized O&Y a :  any of several oil-soluble yellow dyes b or oil yellow II :  a carcinogenic azo dye C6H5N2C6H4N(CH3)2 formerly used in coloring butter and oils; para-dimethyl-aminoazobenzene —called also butter yellow, methyl yellow

  2. 2 :  a moderate greenish yellow that is greener and duller than citron yellow and deeper than linden green

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to criticize severely

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