/ Dictionary / Index T -thermy: Meaning and Definition of Find definitions for: -thermy Pronunciation: [key] a combining form meaning “heat,” “heat generation,” used in the formation of compound words: diathermy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thermotropism therophyte Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language