neutronium
nounEtymology From neutron + -ium. Coined by scientist Andreas von Antropoff in 1926 (before the discovery of the neutron in 1931; neutrons had been predicted to exist in 1920).
1
Natural sciences, Physical sciences, Physics A material composed entirely of neutrons.
2
Natural sciences, Physical sciences, Physics A hypothetical gravitationally bound system of a neutron and an antineutron (the onium of a neutron), not predicted to exist under normal circumstances.
- Synonyms
- element 0, element zero, neutrite, neutrium, neutron-degenerate matter, neutron matter, nilium, n, nn (polyneutron), N (nilium), Nt (neutronium, neutrium), neutron-antineutron system, true neutronium, nn
- Antonyms
- antielement 0, antielement zero, antineutrium, antineutronium, antinilium
- Derived terms
- computronium
- Related terms
- neutron-star matter
- Hypernyms
- degenerate matter, nucleonium, onium
- Hyponyms
- dineutron, mononeutrium, mononeutron, mononeutronium, mononilium, neutron, polyneutrium, polyneutron, polyneutronium, polynilium, tetraneutron, trineutron
- Coordinate terms
- electron-degenerate matter, proton-degenerate matter, quark-degenerate matter, preon-degenerate matter