deuterium

باللغة العربية: دِيُوتِيرْيُوم

1. An isotope of hydrogen with one proton and one neutron in each atom - 21H. (uncountable) · Heavy water is "heavy" because it contains deuterium.
2. An atom of this isotope. (countable) · There were about 80 deuteriums for every million protiums, and virtually no tritium.

الجمع deuteriums