云室

雲室
yúnshì
cloud chamber (physics)

CEDICT

physics

Entry Composition

=1 云 yún (classical) to say
=1 云 yún cloud

classifier: 朵
2 室 shì
  1. room
  2. work unit
  3. grave
  4. scabbard
  5. family or clan
  6. one of the 28 constellations of Chinese astronomy