Definition of purpurogallin in US English:

purpurogallin

noun

Chemistry
  • An orange-red crystalline dye, originally prepared by mild oxidation of pyrogallol and later found to occur in some oak galls.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society. From French purpurogalline from purpur- (in purpurine) + -ogall- + -ine. The dye was so named after the unrelated purpurin by analogy with the preparation of that substance by oxidation of alizarin.

Pronunciation

purpurogallin

/ˌpəːpjʊrə(ʊ)ˈɡalɪn/