antihelium

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

noun Physics.

the antimatter counterpart to helium.

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Scientific definitions for antihelium

antihelium
[ ăn′tē-hēlē-əm, ăn′tī- ]

The antimatter that corresponds to helium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.