water vapour

• Vapeur d'eau, c'est-à-dire l'eau à l'état gazeux, produite par évaporation ou ébullition de l'eau liquide, invisible à l'œil nu mais présente dans l'atmosphère.

Water in its gaseous state, formed when liquid water evaporates or boils, invisible to the naked eye but present in the atmosphere.

1. Water in gaseous formB1formal

   The gaseous state of water, formed when water evaporates or boils, and is invisible to the naked eye.

   vapeur d'eau

   • Water vapour in the air condenses to form clouds.
   • The steam rising from the kettle is water vapour.
   • High levels of water vapour contribute to humidity.