quantum number


Definition of QUANTUM NUMBER

:  any of a set of numbers that indicate the magnitude of various discrete quantities (as electric charge) of a particle or system and that serve to define its state

First Known Use of QUANTUM NUMBER

July 04, 2015
stringent Hear it
rigorous, strict, or severe
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears