/ Dictionary / Index T thermopile: Meaning and Definition of Find definitions for: ther•mo•pile Pronunciation: (thûr'mu-pīl"), [key] — n. Physics. a device consisting of a number of thermocouples joined in series, used for generating thermoelectric current or for detecting and measuring radiant energy, as from a star. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thermopile (Thesaurus) thermophosphorescence thermoplastic Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language