Share this entry
protium Syllabification: pro·ti·um
Pronunciation: /ˈprōdēəm/

Definition of protium in English:


The common, stable isotope of hydrogen, as distinct from deuterium and tritium.
Example sentences
  • The three isotopes are sometimes known by the names of protium, deuterium, and tritium.
  • His hypothesis was that the lighter and more abundant protium isotope would evaporate more quickly than the heavier hydrogen - 2 isotope.


1930s: modern Latin, from Greek prōtos 'first'.

Definition of protium in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove ads and access premium resources