/ Dictionary / Index D diathermancy: Meaning and Definition of Find definitions for: di•a•ther•man•cy Pronunciation: (dī"u-thûr'mun-sē), [key] — pl. -cies. the property of transmitting heat as electromagnetic radiation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diasystem diathermic Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language