ventilagin

\\ven.ˈtiləjə̇n; ˌvent^əlˈāj-, -^əlˈaj-\ noun (-s)

Etymology: International Scientific Vocabulary ventilag- (from New Latin Ventilago — genus name of Ventilago maderaspatana — , irregular from Latin ventulus + agere to drive) + -in — more at agent

: a reddish brown resinous coloring matter C₁₅H₁₄O₆ derived from anthraquinone and obtained from the root bark of an East Indian woody vine (Ventilago maderaspatana) of the family Rhamnaceae