radiocarbon
/ˌreɪdioʊˈkɑrbən/
noun
- A radioactive form of carbon (carbon-14) used in dating ancient organic materials.
- Scientists measure radiocarbon levels in old bones to determine their age.
- The amount of radiocarbon in the sample was very low, indicating it was thousands of years old.
- Radiocarbon is naturally produced in the atmosphere and absorbed by living things.