Subatomic particle

noun

Definitions

Noun
  1. 1
    Any of many units of matter smaller than an atom. particle

    "We humans are so stuck in the middle of the cosmic scales — in average height, one-hundredth of one-septillionth (10^-24) the size of the observable universe, and with typical life spans of a couple octillion attoseconds. And an attosecond is an eternity compared with the lifetime of the elusive Higgs boson, a subatomic particle that exists for one-thousandth of an attosecond before decaying."

  2. 2
    a body having finite mass and internal structure but negligible dimensions wordnet

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