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| corpuscle |
a very small particle of matter, such as a photon or electron. [1/2 definitions] |
| massless |
of certain subatomic particles, having no mass, as a photon or gluon. |
| multiphoton |
combined form of photon. |
| quantum |
an irreducible quantity of energy, such as a photon of light. [1/3 definitions] |
| reaction |
in physics, the atomic change that occurs when a nucleus is bombarded with a particle, photon, or other nucleus. [1/6 definitions] |
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