/ Dictionary / Index H hypothermal: Meaning and Definition of Find definitions for: hy•po•ther•mal Pronunciation: (hī"pu-thûr'mul), [key] — adj. lukewarm; tepid. characterized by subnormal body temperature. (of mineral deposits) formed at great depths and high temperatures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hypothenuse hypothermia Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language