specialist

Etymology

Borrowed from French spécialiste.

adj

1. (Britain) Specialised, involving detailed knowledge of a restricted topic.
   This was a highly specialist job, and it has been very carefully carried out so that it is very hard to see that these windows are now modern replacements. December 15 2021, Robin Leleux, “Awards honour the best restoration projects: Special Award: Signal Box Restoration”, in RAIL, number 946, page 57

noun

1. Someone who is an expert in, or devoted to, some specific branch of study or research.
2. (medicine) A physician whose practice is limited to a particular branch of medicine or surgery.
3. (US, military) Any of several non-commissioned ranks corresponding to that of corporal.
4. An organism that is specialized for a particular environment.
   The tree Lepidothamnus laxifolius is a high alpine specialist found in high-altitude bog communities and in scrub.
5. A stenotopic species.