carbon-13
noun
A stable isotope of carbon, mass number 13, which makes up about 1.1 per cent of natural carbon and is used in isotopic labelling and nuclear magnetic resonance studies.
Origin
1930s; earliest use found in Journal of the American Chemical Society.
- countess
- countess palatine
- countess-ship
- counthood
- countian
- counting
- counting house
- counting-out pen
- countless
- countly
- count noses
- count noun
- count one's blessings
- count (or watch or pinch) the (or your) pennies
- count palatine
- countrified
- countrify
- country
- country air
- country and western
- country bishop
- country blues
- country bookie
- country-born
- country box