/ Dictionary / Index H hymenium: Meaning and Definition of Find definitions for: hy•me•ni•um Pronunciation: (hī-mē'nē-um), [key] — pl. -ni•a the sporogenous layer in a fungus, composed of asci or basidia often interspersed with various sterile structures, as paraphyses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hymenium (Thesaurus) hymeneal hymeno- Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language