Breadcrumb Home > Dictionary > Index I Cite in vivo: Meaning and Definition of Find definitions for: in vi•vo Pronunciation: (in vē'vō), [key] (of a biological process) occurring or made to occur within a living organism or natural setting. Cf. in vitro. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. in vitro fertilization invocate TrendingHere are the facts and trivia that people are buzzing about. April 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress Noble Titles and Ranks in a Monarchy Keeping Your Brain Active in a COVID-19 World Quetzalcoatl: Aztec Myths and Myths About the Aztecs Related Content Daily Word Quiz: risible Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language