What is DEUTERIUM? What does DEUTERIUM mean? DEUTERIUM meaning, definition & explanation Deuterium is one of two stable isotopes of hydrogen. The nucleus of deuterium, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutron in the nucleus. DiscoveryEdit Harold C. Urey in 1931 Atomic NumberEdit Help me! I can't do this! Retrieved from "https://beyond-universe.fandom.com/wiki/Deuterium?oldid=19042" Categories: Atome Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.