tears. pl n. 1. (Physiology) the clear salty solution secreted by the lacrimal glands that lubricates and cleanses the surface of the eyeball and inner surface of the eyelids. 2. a state of intense frustration (esp in the phrase bored to tears). 3. in tears weeping.
Nuclear power is energy which is produced with the use of a controlled nuclear reaction. Many nations use nuclear power plants to generate electricity for both civilian and military use, and some nations also utilize this type of energy to run parts of their naval fleets, especially submarines.
Fusion power is a form of power generation in which energy is generated by using fusion reactions to produce heat for electricity generation. Fusion reactions fuse two lighter atomic nuclei to form a heavier nucleus, releasing energy. Devices designed to harness this energy are known as fusion reactors. The fusion reaction normally takes place in a plasma of deuterium and tritium heated to millions of degrees. In stars, gravity contains these fuels. Outside of a star, the most researched way to confine the plasma at these temperatures is to use magnetic fields.