One skilled in the use of machine tools for fashioning metal parts or tools out of metal.
A constructor of machines and engines; one versed in the principles of machines.
A person who operates machinery.
A person employed to shift scenery in a theater.
Someone who is an expert in, or devoted to, some specific branch of study or research.
A stenotopic species.
A physician whose practice is limited to a particular branch of medicine or surgery.
Any of several non-commissioned ranks corresponding to that of corporal.
An organism that is specialized for a particular environment.
Specialised, involving detailed knowledge of a restricted topic.