Definition of astroparticle in English:

astroparticle

noun

Astronomy
  • A subatomic particle of cosmic origin; a cosmic ray particle.

Origin

1990s. Probably partly shortened from astroparticle physics, and partly from astro- + particle, after astroparticle physics.

Pronunciation

astroparticle

/ˈastrə(ʊ)ˌpɑːtɪkl/