/ Dictionary / Index S spiro-: Meaning and Definition of Find definitions for: spiro- Pronunciation: [key] a combining form meaning “respiration,” used in the formation of compound words: spirograph. spiro- Pronunciation: [key] a combining form meaning “coil,” “spiral,” used in the formation of compound words: spirochete. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spirit writing spirochete Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language