Phosphor (noun)

1. A chemical element with the symbol P, which is a nonmetal.
2. A substance that emits light in the dark, used in fluorescent lights and in some types of screens, such as computer monitors and televisions.

Origin:

From latin phosphorus, from greek phosphoros, literally 'light-bringer', from phos 'light' + phoros 'bringer'.

Examples:

1. The phosphor in the television screen emitted a bright light, creating a clear and vivid picture.
2. The phosphor in the light bulb was carefully coated in order to ensure optimal light emission.
3. The phosphor was a key component in the development of the first television screens.
4. The phosphor was carefully chosen for its ability to emit light in a specific color range.
5. The phosphor was a highly reactive element, and was used in a variety of industrial and technological applications.