Plural of antiparticle; multiple subatomic particles with opposite properties to normal particles, or the general class of antimatter particles.
From antiparticle + -s (plural marker). Simple plural form used in physics to discuss collections of antimatter counterparts.
NASA literally uses antiparticle science—they're developing antimatter rockets that would convert antiparticles into pure energy via annihilation, potentially achieving the fastest possible propulsion system for future space travel.
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