落尘

落塵
luòchén
  1. dust fall
  2. fallout (volcanic, nuclear etc)
  3. particulate matter

CEDICT

  1. 原子弹或氢弹爆炸，对大气造成污染后，降落至地球表面的放射性物质及被放射线污染的尘埃。往往引起严重的辐射污染。
  2. 除雨水外，一般由大气向地面降落之微细粒子，皆称为「落尘」。

重編國語辭典

Entry Composition

1 落 luò
  1. to fall or drop
  2. (of the sun) to set
  3. (of a tide) to go out
  4. to lower
  5. to decline or sink
  6. to lag or fall behind
  7. to fall onto
  8. to rest with
  9. to get or receive
  10. to write down
  11. whereabouts
  12. settlement
2 尘 chén
  1. dust
  2. dirt
  3. earth

Related entries

降尘 jiàngchén
  1. dust fall
  2. fallout (volcanic, nuclear etc)
  3. particulate matter
余波 yúbō
  1. aftermath
  2. repercussions
  3. fallout
颗粒物 kēlìwù particulate matter (PM)
悬浮微粒 xuánfúwēilì
  1. particulates
  2. particulate matter