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antihelium

American  
[an-tee-hee-lee-uhm, an-tahy-] / ˌæn tiˈhi li əm, ˌæn taɪ- /

noun

Physics.
  1. the antimatter counterpart to helium.


antihelium Scientific  
/ ăn′tē-hēlē-əm,ăn′tī- /
  1. The antimatter that corresponds to helium.


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