great doctor; sage physician
An honorific title for a physician of exceptional skill and wisdom, often used in historical or reverential contexts. Not an everyday word.
He was such a renowned doctor that he was praised as a sage physician.
この病院の創設者は、地域で医聖と呼ばれている。
The founder of this hospital is called a great doctor in the region.
Compound of 医 (medicine, doctor) and 聖 (sage, saint). The exact historical origin is uncertain, but it follows a pattern of honorific titles combining a field with 聖.