/ Dictionary / Index H hypaethral: Meaning and Definition of Find definitions for: hy•pae•thral Pronunciation: (hi-pē'thrul, hī-), [key] — adj. hypethral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hypaethral (Thesaurus) hypaesthesia hypalgesia Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language