Definition of astroparticle physics in English:
astroparticle physics
noun
Astronomy
The branch of physics concerned with subatomic particles of cosmic origin and their relevance to astrophysics and cosmology.
Origin
1980s. From astro- + particle physics.
Pronunciation
astroparticle physics
/ˌastrə(ʊ)ˌpɑːtɪkl ˈfɪzɪks/