Origin: Greek suffix -ology
Dermatology has 2 different meanings across 1 category:
the branch of medicine dealing with the skin and its diseases
"After visiting a specialist in dermatology, I finally found out that my persistent rash was caused by an allergic reaction to my new laundry detergent."
The study of the skin and its diseases.
"She decided to visit a dermatologist because her persistent rash required an expert in the study of the skin and its diseases to diagnose it."