particle
Definitions
A minute portion of matter.
A minor part of speech that does not inflect, such as an article, preposition, or conjunction.
A subatomic constituent of matter, such as a proton, neutron, or electron.
Examples
A single particle of dust danced in the beam of sunlight.
Physicists are studying the behavior of every subatomic particle in the collider.
Not a particle of evidence was found to support his claim.