noun. One who is devoted to a particular occupation or branch of study or research.

noun. A physician whose practice is limited to a particular branch of medicine or surgery, especially one who is certified by a board of physicians.

noun. Any of several noncommissioned ranks in the US Army that correspond to that of corporal through sergeant first class.

noun. A species with narrow habitat or food requirements.

noun. A person who devotes himself to a particular branch of a profession, science, or art; one who has a special knowledge of some particular subject: thus, ophthalmologists, neurologists, or gynecologists are specialists in medicine.

noun. One who devotes himself to some specialty

adjective. Specialised.

noun. Someone who is an expert in, or devoted to, some specific branch of study or research.

noun. A physician whose practice is limited to a particular branch of medicine or surgery.

noun. Any of several non-commissioned ranks corresponding to that of corporal.

noun. an expert who is devoted to one occupation or branch of learning

noun. practices one branch of medicine

"In the case of NetizensForBradley. org, the specialist is the young Greg Laynor, who has read all the FEC literature but still concludes that "it's not clear if we're doing something wrong.""

adviser  assistant  consultant  department  expert  

Wall Streeter  adept  aficionado  aficionado  amateur