• Webster's Revised Unabridged Dictionary
    • n Hematein (Chem) A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins.
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Century Dictionary and Cyclopedia
    • n hematein An 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.
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Webster's Revised Unabridged Dictionary
Gr. , , blood