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deuterium
This term is used exclusively within scientific and technical registers, specifically in chemistry, nuclear physics, and energy research. It describes a specific isotope of hydrogen, distinguishing it from protium (the most common isotope) and tritium (the radioactive isotope).
As a chemical element isotope, it is treated as an uncountable mass noun. It refers to the substance itself rather than individual atoms in standard usage, meaning it does not take a plural form in professional scientific discourse.
Meanings
Examples
The reactor uses a mixture of deuterium and tritium to trigger fusion.
Heavy water is simply water where the hydrogen atoms are replaced by deuterium.
Wait, does this sample contain deuterium or regular hydrogen?
The sun fuses hydrogen into helium, but deuterium plays a key role in the early stages.
I wonder if we can isolate enough deuterium for the experiment.
The mass of a deuterium nucleus is approximately twice that of a protium nucleus.
We need to check the deuterium levels in the coolant.