| 1. | a person who devotes himself or herself to one subject or to one particular branch of a subject or pursuit. |
| 2. | a medical practitioner who devotes attention to a particular class of diseases, patients, etc. |
| 3. | U.S. Army. an enlisted person of one of four grades having technical or administrative duties, the grades corresponding to those of corporal through sergeant first class but not requiring the exercise of command. |
| 4. | Stock Exchange. a member of an exchange who executes orders in his or her name or for other stockbrokers in a single stock or a particular group of stocks and thus helps maintain the market in those securities on that exchange. |
specialist
specialist spe·cial·ist (spěsh'ə-lĭst)
n.
A physician whose practice is limited to a particular branch of medicine or surgery, especially one who is certified by a board of physicians.