/ Dictionary / Index H hyalo-: Meaning and Definition of Find definitions for: hyalo- Pronunciation: [key] a combining form meaning “glass,” used in the formation of compound words: hyaloplasm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyalite hyalograph Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language