Breadcrumb Home > Dictionary > Index E extrachromosomal: Meaning and Definition of Find definitions for: ex•tra•chro•mo•so•mal Pronunciation: (ek"stru-krō"mu-sō'mul), [key] — adj. Genetics. of or pertaining to DNA that exists outside the main chromosome and acts independently. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extracellular extra-condensed TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census 50 Spookiest Halloween Quotes Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: nemesis Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language