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.
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| a fool or simpleton; ninny. |
| a chattering or flighty, light-headed person. |
| beta radiation | |
noun | |
| radiation of beta particles during radioactive decay |