What are some interesting way to define a doctor?

I'm doing an essay on doctors and i'm trying to find an more interesting definition to describe a doctor. I've looked, but the only real definition of a doctor is: A person, especially a physician, dentist, or veterinarian, trained in the healing arts and licensed to practice.I want something more interesting, i'm going to use it as an attention getter.Can anyone help?|||A specialist in curing ailments