Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of a class of subatomic particles that are composed of two or three quarks and participate in strong interactions. The class of hadrons is divided into the mesons and baryons.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Physics) any elementary particle that interacts strongly with other particles.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics A strongly interacting particle such as a proton. A particle which is affected by the strong nuclear force. A hadron is composed of quarks.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any elementary particle that interacts strongly with other particles

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek hadros, thick; see sā- in Indo-European roots + –on.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek ἁδρός (hadros, "thick").

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