neutronium

English

Etymology

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).

Pronunciation

enPR: no͞o-trōʹnē-əm

Noun

neutronium (uncountable)

(physics) A material composed entirely of neutrons.
(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

Sense 1:
- element 0
- element zero
- neutrite
- neutrium
- neutron-degenerate matter
- neutron matter
- nilium
- Symbols:
  - n
  - n_n (polyneutron)
  - N (nilium)
  - Nt (neutronium/neutrium)
Sense 2:
- neutron-antineutron system
- true neutronium
- Symbols:
  - nn

Antonyms

antielement 0
antielement zero
antineutrium
antineutronium
antinilium

Hypernyms

Sense 1:
- degenerate matter
Sense 2:
- 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

Translations

neutron star material

French: neutronium (fr) m
Italian: neutronio m