/ Dictionary / Index H hyalophane: Meaning and Definition of Find definitions for: hy•al•o•phane Pronunciation: (hī-al'u-fān", hī'u-lu-), [key] — n. Mineral. a variety of orthoclase in which some of the potassium is replaced by barium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyalomere hyaloplasm Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language