Particle
/pˈɑrtəkəl/
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Definition
(noun) A very small piece of matter, a fragment; especially, the smallest possible part of something.
Sentence Examples
He doesn't have a particle of kindness in his heart.
He does not have a particle of honesty in him.
CEFR Practice Quiz
Scientists at the laboratory detected a new subatomic ____ during the high-energy collision experiment.