/ Dictionary / Index H hyperon: Meaning and Definition of Find definitions for: hy•per•on Pronunciation: (hī'pu-ron"), [key] — n. Physics. any baryon with strangeness other than zero, esp. one with a relatively long lifetime. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hyperon (Thesaurus) hypernatremia hyperopia Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language