| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
cyclotron (sī'klə-trŏn') Pronunciation Key
(click for larger image in new window) A type of particle accelerator that accelerates charged subatomic particles, such as protons and electrons, in an outwardly spiraling path, greatly increasing their energies. Cyclotrons are used to bring about high-speed particle collisions in order to study subatomic structures. Compare linear accelerator. See also synchrocyclotron. See Note at particle accelerator. |
The first kind of particle accelerator built.
Note: Cyclotrons are now used for special research projects.