Science, Tech, Math › Science Daughter Isotope Definition - Chemistry Glossary Share Flipboard Email Print Science Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry in Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Anne Marie Helmenstine, Ph.D. Updated March 06, 2017 Daughter Isotope Definition: The product which remains after an original isotope has undergone radioactive decay. The original isotope is termed the 'parent'.Return to the Chemistry Glossary Index citecite this article Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Daughter Isotope Definition - Chemistry Glossary." ThoughtCo, Jun. 21, 2014, thoughtco.com/definition-of-daughter-isotope-in-chemistry-605861. Helmenstine, Anne Marie, Ph.D. (2014, June 21). Daughter Isotope Definition - Chemistry Glossary. Retrieved from https://www.thoughtco.com/definition-of-daughter-isotope-in-chemistry-605861 Helmenstine, Anne Marie, Ph.D. "Daughter Isotope Definition - Chemistry Glossary." ThoughtCo. https://www.thoughtco.com/definition-of-daughter-isotope-in-chemistry-605861 (accessed May 20, 2018). copy citation Continue Reading