Open Dictionary
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL:

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

n. - An isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen).

Usage examples (37)
  • A chemical called deuterium is a heavier version of hydrogen.
  • The fuel for Iter is two heavy isotopes of hydrogen called deuterium and tritium.
  • And the principal fuel, a heavy isotope of hydrogen called deuterium, is present in ordinary water, of which there is no shortage.
  • The main source of energy for both plasma and cold fusion appears to be deuterium, which is present in small concentration in all water. for more
Tutoring comment

Tutoring comment not yet available...

add more
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google,,, and YouTube,,,,, as well as the generous Creative Commons community.