/ Dictionary / Index S strepto-: Meaning and Definition of Find definitions for: strepto- Pronunciation: [key] a combining form meaning “twisted,” used in the formation of compound words: streptococcus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. strep throat streptobacillus Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language