Quadrium
noun ·Uncommon ·Advanced level
Definitions
- 1 Synonym of quadrivium. uncountable
"Church music was carefully taught at the universities. IT was of the four sciences of the quadrium, and was a means of promotion in the church and colleges."
- 2 A highly unstable synthetic isotope of the element hydrogen, ⁴₁H, having one proton and three neutrons. rare, uncountable
"The decimal character of 4.1 is a reminder that this is not a conventional H isotope such as quadrium, ⁴H, or other isotopes up to ⁷H, with lifetimes, when known in the 0.1 to 1 zs range."
- 3 A quadrium atom or nucleus. rare, uncountable
"The almost stationary ultra-cold neutron(s) occupies a position in the metal lattice where another dissolved hydrogen is most likely to tunnel in less than a nanosecond, forming a deuteron / triton / quadrium by capturing the cold neutron and releasing binding energy."
Example
More examples"Church music was carefully taught at the universities. IT was of the four sciences of the quadrium, and was a means of promotion in the church and colleges."
Etymology
From quadr- + -ium.
More for "quadrium"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.