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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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n. - A stable particle with positive charge equal to the negative charge of an electron.

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Usage examples (24)
  • The device is called a proton precession magnetometer.
  • Long-term proton pump inhibitor therapy and risk of hip fracture.
  • A proton is nothing but the nucleus of the lightest atom, i.e. hydrogen.
  • A proton is an infinitesimal part of an atom, which is itself of course an insubstantial thing.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.