01 n. A name given to any one of a series of orange-red dyestuffs produced artificially from certain complex sulphonic acid derivatives of azo an…
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1.
A name given to any one of a series of orange-red dyestuffs produced artificially from certain complex sulphonic acid derivatives of azo and diazo hydrocarbons of the aromatic series; -- so called because of the general resemblance to the shades of nasturtium (Tropaeolum).(Chem.)