What does deuterated mean?
"Deuterated" is an adjective used in chemistry to describe a compound in which one or more of its ordinary hydrogen atoms have been replaced by deuterium, a heavier isotope of hydrogen that carries an extra neutron. Because deuterium behaves chemically much like hydrogen but differs detectably in mass, deuterated substances are invaluable research tools: they serve as tracers for following reactions, help determine molecular structures, and act as solvents — such as deuterated chloroform — whose signals do not interfere with proton nuclear magnetic resonance spectroscopy. The best-known example is deuterated water, commonly called heavy water, which played a historic role in early nuclear reactor development. The word appears almost entirely in scientific writing and technical discussion. Its connotations are precise and specialised rather than everyday, making it a useful marker of laboratory science wherever isotopic labelling or spectroscopic work is described.
adjective(Of a chemical compound) containing deuterium in place of some or all of its ordinary hydrogen atoms. Deuterated compounds are widely used as tracers and solvents, notably in nuclear magnetic resonance spectroscopy.
- (Chemistry) Describing a compound in which one or more hydrogen atoms have been replaced by deuterium atoms.
"The NMR spectrum was recorded using a deuterated solvent to avoid interference from hydrogen signals."
"Samples were dissolved in deuterated chloroform before analysis."
"The team synthesised a fully deuterated analogue of the drug to study its metabolic pathway."
Swap every hydrogen atom for its heavy twin and you get 'heavy water' — the substance that helped make nuclear reactors possible.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of deuterated
The word combines "deuterium" — coined in the 1930s by American chemist Harold Urey from Greek "deuteros", meaning "second", because deuterium is the second isotope of hydrogen — with the suffix "-ated" used to form adjectives indicating chemical treatment or composition. Its Greek root also underlies words such as "Deuteronomy" (literally "second law") and "deuteragonist" (the second-most important character in a drama). Deuterated thus literally means "made second-isotoped": built from hydrogen's heavier twin.
Word family
Usage notes
A technical term used almost exclusively in chemistry, spectroscopy, and related sciences; it is neutral in register but unfamiliar to general readers. It typically appears attributively before a noun (a deuterated solvent) rather than predicatively.
Don't confuse with
Hydrogenated means having had hydrogen added to a compound, whereas deuterated means ordinary hydrogen atoms have been replaced with the heavier isotope deuterium.