樹じゅ霜そう

noun

air hoar; soft rime; air frost

Meteorological term for a feathery ice deposit formed on trees and other objects by direct sublimation of water vapor, typically in cold, calm conditions.

• 樹じゅ霜そうは、風かぜの弱よわい寒さむい朝あさに木きの枝えだにできることが多おおい。

  Soft rime often forms on tree branches on cold, calm mornings.