Antineutrino
An antineutrino is a type of particle, the antimatter counterpart to the neutrino. 

The starship  was bombarded by antineutrinos when Ensign Seska attempted to activate a Sikarian spatial trajector unit aboard the ship. The ensuing antineutrino bombardment of Voyagers plasma manifold dramatically raised the warp core's plasma temperature, risking a containment breach. ()

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ja:反ニュートリノ
Particles