TROPAEOLIN

Etymology

Noun

tropaeolin (countable and uncountable, plural tropaeolins)

Any of several orange dyes of very complex composition: tropaeolin O (acid orange 6, chrysoine resorcinol), tropaeolin OO (acid orange 5), or tropaeolin OOO (acid orange 7).

Source: Wiktionary

Tro*pæ"o*lin, n. (Chem.)

Definition: 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 (Tropæolum).

Source: Webster’s Unabridged Dictionary 1913 Edition

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