vapori-, vapor-, vapo- +

(Latin: steam)

vapor-permeable membrane
A membrane, usually transparent, that is permeable to oxygen and water vapor.

it may be prepared with an adhesive backing that will stick only to dry skin. This tkype of membrane has been used in treating wounds.

The membrane must be applied properly without wrinkles and changed as often as necessary to prevent excess accumulation of fluid and bacteria under it.

vaportherapy
Therapeutic use of an aerosol or mist, either of simple vaporized moisture or containing medicinal substances.
vaporthorax
The presence of water vapor in the pleural space, occurring at high altitudes in people who are not in a pressurized situation.