at·om
 atom
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- pronunciation:
- ae
t
m
- features:
- Word Combinations (noun), Word History, Word Explorer, Word Parts
| part of speech: |
noun |
| definition 1: |
an invisible component of any element, consisting of protons, neutrons, and electrons, once considered the smallest possible unit of matter.
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| definition 2: |
anything extremely small; tiny bit.
- similar words:
- grain, modicum, molecule, particle
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Atom is from an ancient Greek word that means "not able to be cut or divided."