/ Dictionary / Index H hygrothermograph: Meaning and Definition of Find definitions for: hy•gro•ther•mo•graph Pronunciation: (hī"gru-thûr'mu-graf", -gräf"), [key] — n. an instrument for recording temperature and relative humidity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hygroscopic Hygroton Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language