pityriasis

The story

1. Ancient Greek · derived fromπίτῡρον“bran”
2. Koine Greek · derived fromπιτυρίασις
3. New Latin · derived frompityriasis
4. English todaypityriasis

From New Latin pityriasis, from Koine Greek πιτυρίασις (pituríasis), from Ancient Greek πίτῡρον (pítūron, “bran”).

First known use, by meaning

• from 17th c. Any of several varieties of skin diseases characterized by the shedding of flakes or scales, such as dandruff.