neutronium
A material composed entirely of neutronsA material composed entirely of neutrons.
UK/njuːˈtɹəʊni.əm/US/nuˈtɹoʊni.əm/
Meaning
2 senses(uncountable)A material composed entirely of neutrons.
(uncountable)A hypothetical gravitationally bound system of a neutron and an antineutron (the onium of a neutron), not predicted to exist under normal circumstances.
Translations
2 languagesOrigin
From neutron + -ium. Coined by scientist Andreas von Antropoff in 1926 (before the discoveFrom 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).
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Synonyms
15 synonymsSymbols:nnn (polyneutron)N (nilium)Nt (neutroniumneutrium)nn
Sense 2:neutron-antineutron systemtrue neutronium
Antonyms
5 antonymsantielement 0antielement zeroantineutriumantineutroniumantinilium
Word family
1 related wordsDerivedcomputronium
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable