Source : Webster's Revised Unabridged Dictionary (1913)

Haematexylin \H[ae]m`a*tex"y*lin\, n. [See {H[ae]matoxylon}.]
   (Chem.)
   The coloring principle of logwood. It is obtained as a yellow
   crystalline substance, {C16H14O6}, with a sweetish taste.
   Formerly called also {hematin}.