hematein

noun
he·​ma·​tein
variants: or chiefly British haematein \ ˌhē-​mə-​ˈtē-​ən How to pronounce haematein (audio) , ˈhē-​mə-​ˌtēn How to pronounce haematein (audio) \

Medical Definition of hematein

: a reddish brown crystalline compound C16H12O6 constituting the essential dye in logwood extracts