Webster’s Revised Unabridged Dictionary · 1913
Hematein
Hem′a·te′in (hĕm′ȧ·tē′ĭn), n. [Gr. αἷμα, αἵματος, blood.] (Chem.) A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins.