an·​ti·​helium | \ " + \

Definition of antihelium

: the antimatter counterpart of helium

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First Known Use of antihelium

1963, in the meaning defined above

History and Etymology for antihelium

anti- entry 1 + helium

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The first known use of antihelium was in 1963

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Cite this Entry

“Antihelium.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

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