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.
- pass someone over
- pass someone/thing off as
- pass something off
- pass something over
- pass something up
- pass the baton
- pass the buck
- pass the hat (round)
- pass the hat round (or pass the hat)
- pass the parcel
- pass the time of day
- pass-through
- pass ticket
- pass transistor
- passum
- passus
- pass water
- passway
- password
- passworded
- passwording
- password-protect
- password-protected
- password protection
- ice wool