Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.

Definition of Deuterium

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Deuterium: A non-radioactive isotope of hydrogen that contains a neutron in its nucleus in addition to the one proton normally seen in hydrogen. A deuterium atom is twice as heavy as normal hydrogen.

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