High-energy electrons, carrying a negative charge, that are sent out by some radioactive nuclei. (See alpha radiation and gamma radiation.)
Note: Beta radiation, unlike alpha radiation, has some penetrating power and can pass through clothing and wooden walls.
| beta radiation | |
noun | |
| radiation of beta particles during radioactive decay |
| a chattering or flighty, light-headed person. |
| a scrap or morsel of food left at a meal. |