vapor
US
UK vapor (US), vapour (UK) n: (gas, steam)
SC 水汽, 水蒸气
Vapour was coming out of the air vent.
water vapor (US), water vapour (UK) n: (steam)
SC 水蒸气 shuǐ zhēng qì
TC 水蒸氣
TC 水蒸氣
Water vapor is produced by boiling liquid water or sublimating ice.