細顆粒物 [细颗－－]

Jyutping sai3 fo2 lap1 mat6
Pinyin xì kē lì wù

Definitions (CC-CEDICT)
  1. fine particle (PM 2.5)
  2. fine particulate matter (air pollution etc)
Definitions (Wiktionary)
  1. noun
    particulate matter 2.5 (PM2.5)