/ Dictionary / Index H hysteroid: Meaning and Definition of Find definitions for: hys•ter•oid Pronunciation: (his'tu-roid"), [key] — adj. resembling hysteria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hysterogenic hysteron proteron Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language