/ Dictionary / Index H hesperidium: Meaning and Definition of Find definitions for: hes•per•id•i•um Pronunciation: (hes"pu-rid'ē-um), [key] — pl. -per•id•i•a the fruit of a citrus plant, as an orange. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hesperidin hesperinos Related Content Daily Word Quiz: sylvan Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language