a porphyrin made by treating haemoglobin with acid, used to treat cancer in photodynamic therapy
hematoporphyrin in American English
(ˌhɛməˌtoʊˈpɔrfərɪn)
noun
a type of porphyrin, C34H38O6N4, obtained by treating hemoglobin with a strong acid: it is used in cancer research because it fluoresces under ultraviolet light and is readily absorbed by cancerous tissue