The Collaborative International Dictionary
Haematoporphyrin
Haematoporphyrin \H[ae]m`a*to*por"phy*rin\ (-p[^o]r"f[i^]*r[i^]n), n. [H[ae]mato- + Gr. porfy`ra purple.] (Physiol. Chem.) See H[ae]matoin.
Wiktionary
haematoporphyrin
n. (context biochemistry English) haematoin