We found one dictionary that defines the word neutrium:

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1. neutrium: Wiktionary

Definitions from Wiktionary (neutrium) ▸ noun:  Synonym of neutronium ▸ Words similar to neutrium ▸ Usage examples for neutrium ▸ Idioms related to neutrium ▸ Wikipedia articles (New!) ▸ Popular adjectives describing neutrium ▸ Words that often appear near neutrium ▸ Rhymes of neutrium ▸ Invented words related to neutrium