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Particle system

technique in game physics, motion graphics, and computer graphics; uses very many very small graphic objects to simulate certain “fuzzy” phenomena (e.g. highly chaotic systems, natural phenomena, or processes caused by chemical reactions)

Pronunciation
/ˈpɑrdəkəl ˈsɪstəm/
/ˈpɑːtɪkəl ˈsɪstəm/