The Collaborative International Dictionary of English v.0.48:
Dermatology \Der`ma*tol"o*gy\, n. [Gr. de`rma, -atos, skin + -logy: cf. F. dermatologie.] The science which treats of the skin, its structure, functions, and diseases. [1913 Webster]WordNet (r) 3.0 (2006):
dermatology n 1: the branch of medicine dealing with the skin and its diseases