When steam is cooled in the air you can see it condensing what that called?

The process of steam cooling in the air and becoming visible is known as condensation. When water vapor in the air cools down to its dew point, it condenses into liquid water droplets. These droplets then scatter light, making the steam visible. The dew point is the temperature at which the air can no longer hold all of the water vapor it contains, so the vapor condenses into liquid water.