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Webster 1913 Edition
Tropaeolin
Tro-pae′o-lin
,Noun.
(Chem.)
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
).