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| a progressive disturbance propagated in a medium without progress or advance by the points themselves, as in the transmission of sound or light |
| pertaining to a process that occurs within an atom; noting a particle contained in an atom, such as electrons, protons, or neutrons |
synchronous syn·chro·nous (sĭng'krə-nəs, sĭn'-)
adj.
Occurring or existing at the same time.