the GNU version of the Collaborative International Dictionary of English
n. Hematoxylin.
n. 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.
The Century Dictionary and Cyclopedia
n. A brown amorphous substance derived from hemoglobin in the blood, also forming scales of a bluish-black color with a metallic luster.
n. Same as hematoxylin.
n. Also spelled hematine, hæmatine.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a complex red organic pigment containing iron and other atoms to which oxygen binds
Word Usage
"I have my pen out, ready to arrange for some further tests and write an order for hematin, to help reduce the demand for heme and thereby lower porphyrin levels."