/ Dictionary / Index I isohume: Meaning and Definition of Find definitions for: i•so•hume Pronunciation: (ī'su-hym"), [key] — n. Meteorol. a line on a weather map or chart connecting points of equal relative humidity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isohel isohyet Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language