# extinct radionuclide

> radionuclide formed by nucleosynthesis before formation of the Solar System

**Wikidata**: [Q5422075](https://www.wikidata.org/wiki/Q5422075)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Extinct_radionuclide)  
**Source**: https://4ort.xyz/entity/extinct-radionuclide