Where does “erythema” come from?

Erythema comes from New Latin erythema, from Ancient Greek ἐρύθημα, derived from the adjective ἐρυθρός meaning "red," ultimately from Proto-Indo-European h₁rewdʰ- meaning "to redden."

erythema (English): Abnormal redness and inflammation of the skin,...

Definitions

Abnormal redness and inflammation of the skin,...

Ancestry of “erythema”, step by step

Step	Language	Word	Meaning
1	New Latin	erythema	—
2	Ancient Greek	ἐρύθημα	a redness or flush on the skin
3	Ancient Greek	ἐρυθρός	reddish, red
4	Proto-Hellenic	*erutʰrós	—

Words derived from “erythema”

erythemal
erythemic
erythemogenic
suberythemal

Every word from Proto-Hellenic *erutʰrós →Every word from Ancient Greek ἐρυθρός →Every word from Ancient Greek ἐρύθημα →