• WordNet 3.6
    • n hematin a complex red organic pigment containing iron and other atoms to which oxygen binds
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Webster's Revised Unabridged Dictionary
    • Hematin (Physiol. Chem) A bluish black, amorphous substance containing iron and obtained from blood. It exists the red blood corpuscles united with globulin, and the form of hemoglobin or oxyhemoglobin gives to the blood its red color.
    • Hematin Hematoxylin.
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Century Dictionary and Cyclopedia
    • n hematin A brown amorphous substance derived from hemoglobin in the blood, also forming scales of a bluish-black color with a metallic luster.
    • n hematin Same as hematoxylin.
    • n hematin Also spelled hematine, hæmatine.
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Webster's Revised Unabridged Dictionary
Gr. a"i^ma a"i`matos, blood


In literature:

Hematin crystals, 3/4 oz.
"Vegetable Dyes" by Ethel M. Mairet