/ Dictionary / Index H hyetograph: Meaning and Definition of Find definitions for: hy•et•o•graph Pronunciation: (hī-et'u-graf", -gräf", hī'i-tu-), [key] — n. a map or chart showing the average rainfall for the localities represented. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyeto- hyetography Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language