birthmark; nevus
Medical term for a congenital skin mark. In everyday conversation, あざ is more common.
I had a birthmark examined at the dermatology clinic.
melanocytic nevus; pigmented nevus; nevocellular nevus
melanocytic nevus; pigmented nevus; nevocellular nevus
Compound of 母 (mother, origin) and 斑 (spot, patch), referring to a congenital skin mark. The exact historical derivation is uncertain.