nHematein(Chem) A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins.
Century Dictionary and Cyclopedia
nhemateinAn organic principle (C16H12O6 + 3aq.) derived from the coloring matter of logwood. It forms dark-violet crystalline scales, which show by reflected light a greenish hue, and are sometimes observable on logwood. Also hemateine, hæmateine.