heavy hydrogen

noun

: deuterium

Examples of heavy hydrogen in a Sentence

Recent Examples on the Web

Commercial fusion reactors will run on a mix of two heavy hydrogen isotopes, known as deuterium and tritium. — Aman Tripathi, Interesting Engineering, 7 Aug. 2026

The comet contains far more heavy hydrogen—in the form of an isotope called deuterium, which has one neutron and one proton—than any local space rock, a quality that tends to point to colder environs. — Joseph Howlett, Scientific American, 22 June 2026

Deuterated water refers to water in which one hydrogen atom is replaced with deuterium, a heavy hydrogen isotope that has an atomic nucleus composed of one proton and one neutron. — Robert Lea, Space.com, 23 Apr. 2026

Most fusion projects are based on fusing two heavy hydrogen isotopes deuterium and tritium, while others are looking at what is known as aneutronic fusion using proton-boron or helium-3 fusion. — David Szondy, New Atlas, 8 July 2024

Word History

First Known Use

1933, in the meaning defined above

Rhymes for heavy hydrogen

• dihydrogen

Kids Definition

heavy hydrogen

noun

: deuterium

Medical Definition

heavy hydrogen

noun

: deuterium