phymatorhysin

\\ˌfīməˈtȯrəsə̇n\ noun (-s)

Etymology: phymato- (from Latin phymat-, phyma) + -rhysin (from Greek rhysis flow — from rhein to flow — + English -in) — more at stream

: a melanin pigment found in certain melanotic tumors in man and in the urine of persons affected with them