/ Dictionary / Index H hypnograph: Meaning and Definition of Find definitions for: hyp•no•graph Pronunciation: (hip'nu-graf", -gräf"), [key] — n. an instrument that measures activities of the human body during sleep. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hypnogenesis hypnoidal Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language