antihelion

== English == === Etymology === From anti- +‎ helion. === Noun === antihelion (plural antihelions) The antiparticle of a helion, consisting of two antiprotons and one antineutron. ==== Synonyms ==== antihelium-3 nucleus ==== Hypernyms ==== antiatomic nucleus antinucleus antiparticle atomic nucleus antihelium antihelium-3 antihelium nucleus nuclear antiparticle nuclear particle nucleus particle subatomic particle