What does Ultraviolet C mean in medical term?

Ultraviolet C means: Although ultraviolet light may cause damage to your health, you can still maintain and improve your health with it. The production of vitamin D is stimulated when ultraviolet light hits the skin. This promotes bone and tooth growth.
(in Medical Dictionary)

What else does Ultraviolet C mean?

However, ultraviolet A and UVB penetrate the ozone layer and reach the Earth’s surface in an attenuated state. Since ultraviolet A is less powerful than UV B, researchers have long blamed the ultraviolet B for skin cancer.
History of sunburns and overexposure to UV radiation. However, recent research has implicated UV A in skin cancer. Artificial light can also be a cause of skin cancer, in addition to the natural sunlight.
The ultraviolet A and UV B are found in the light of tanning lamps. The ultraviolet light from electric arc lamps is also used to heat furnaces and enable motion picture projectors to display movies.
(in Medical Dictionary)

While ultraviolet C may be the most harmful type of ultraviolet radiation, in terms of potential harm to human health and life on Earth it is not allowed to penetrate the protective layer of ozone. It is therefore not a threat to any species of plant, animal, or human life.
(in Medical Dictionary)

Ultraviolet A: Also known as ultraviolet A or ultraviolet B, this is one of three forms of invisible light rays.
(in Medical Dictionary)