Definitions

1. noun

a heavy isotope of hydrogen, with an atomic mass of 2, having one proton and one neutron in its nucleus.

“The scientist used a mass spectrometer to analyze the deuterium content of the water sample.”

2. noun

a rare isotope of hydrogen used in nuclear fusion reactions.

“The team of researchers was working on a project to harness energy from deuterium-tritium fusion reactions.”

3. noun

a radioactive isotope of hydrogen used in nuclear reactors and as a fuel for fusion reactions.

“The deuterium used in the nuclear reactor was carefully handled and stored to prevent any accidents.”