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Any of the baryons that are not nucleons, have a mass greater than that of the neutron, and are not stable.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(General Physics) physics any baryon that is not a nucleon
[C20: from hyper- + -on]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhaɪ pəˌrɒn)

any baryon with nonzero strangeness, esp. one with a relatively long lifetime.
[1950–55; < Greek hypér + -on1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hyperon - any baryon that is not a nucleon; unstable particle with mass greater than a neutron
baryon, heavy particle - any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions; a hadron with a baryon number of +1
lambda hyperon, lambda particle - an electrically neutral baryon with isotopic spin 1
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