気き相そう

noun

gas phase; gaseous phase

Technical term in chemistry referring to the state of matter where a substance exists as a gas.

• 水みずは気き相そうになると水すい蒸じょう気きと呼よばれる。

  When water becomes a gas phase, it is called water vapor.

• この反はん応のうは気き相そうで起おこる。

  This reaction occurs in the gas phase.