/ Dictionary / Index E Erythrocin: Meaning and Definition of Find definitions for: E•ryth•ro•cin Pronunciation: (i-rith'ru-sin), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of erythromycin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: erythrocin (Thesaurus) erythroblastosis erythrocyte Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language