/ Dictionary / Index X xerothermic: Meaning and Definition of Find definitions for: xe•ro•ther•mic Pronunciation: (zēr"u-thûr'mik), [key] — adj. of or pertaining to the condition of being dry and hot: a xerothermic climate. adapted to an environment that is dry and hot: a xerothermic organism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xerostomia Xerox Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language