-ician

A member of an academy or society concerned with the arts or sciences.

1. A specialist in acoustics.
2. Someone who fits hard-of-hearing people with hearing aids.

A critic concerned with the theory of beauty and the fine arts.

Someone who uses technological devices and principles in agriculture to improve crop production.

Someone who is skilled in navigating the arctic regions.

1. A technician specializing in the measurement of hearing ability (audiometry).
2. A person trained to measure auditory threshold, and, usually, to carry out a wide variety of other audiological investigations.

A health practitioner specializing in bariatrics.

1. Someone who specializes in the science of biometry, or biometrics, which is the study biostatistics including the calculation of the probable duration of human life.
2. A person who uses statistical techniques to analyze biological data.

1. Someone who makes, or sells, cosmetics; or who applies them professionally.
2. Someone who works in a beauty parlor.

A specialist in the duplication or imitation of biological control systems that use technology which is similar to the human nervous system and electronic machines: "Cyberneticians are experts in the science of communications and automatic control elements in both machines and living things."

1. A person who diagnoses, especially a physician specializing in medical diagnostics.
2. An expert in making diagnoses; especially, a medical doctor.
3. Someone with special skills in identifying the cause or nature of a problem even in areas other than medical.

A guess of diagnosticians.