Breadcrumb Home > Dictionary > Index T Tetracyn: Meaning and Definition of Find definitions for: Tet•ra•cyn Pronunciation: (te'tru-sin), [key] — Pharm., Trademark. Pharm.,Trademark. a brand name for a form of tetracycline. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetracycline tetrad TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: terraincognita Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language