Bariatrics means: Bariatrics is a medical term that refers to weight loss. It was first derived from the Greek baros (weight +) and -iatrics. Barium, barometer and other words are also derived from this Greek root.
(in Medical Dictionary)

What else does Bariatrics mean?

Bariatrics is a field of medicine which treats overweight people with a complete program that includes diet, nutrition, exercise and behavior modification. When indicated, prescriptions of appetite suppressants or other medications may be made. The field of bariatrics includes the study and treatment of overweight.
(in Medical Dictionary)

This is a branch of medicine which deals with obesity prevention and treatment.
(in Merlin Dictionary)