atom
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plural
atoms
plural
atoms
Learner's definition of ATOM
[count]
1
:
the smallest particle of a substance that can exist by itself or be combined with other atoms to form a molecule
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carbon atoms
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an atom of hydrogen
2
:
a very small amount of something
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The flu took every atom [=bit] of strength I had.
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There is not an atom of truth to what he said.
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