| Term | Definition |
|---|
| Accelerate | to speed up |
| Accelerator | a machine which accelerates charged particles to high energies |
| Antimatter | matter that is exactly the opposite in every way from its matter counterpart: antiquark/quark; positron/electron |
| Atom | the smallest unit of a chemical element, made up of a nucleus surrounded by electrons |
| Beam | a ray of light; a group of particles traveling together along a well-defined path |
| BEAMS | the acronym for Becoming Enthusiastic About Math and Science |
| CEBAF | former name of Jefferson Lab; stands for Continuous Electron Beam Accelerator Facility |
| Celsius | a temperature scale on which water freezes at 0° and boils at 100° |
| Charge | the amount of electricity carried by a body (A charge can be negative, like an electron, or positive, like a proton. Objects with opposite charges attract one another, while objects with like charges repel one another.) |
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