The temperature and pressure at which the first subsurface bubble of vapor is formed in a multicomponent liquid
The pressure at which air first passes through a wet membrane; the path being the channel of greatest pore size
The differential gas pressure at which the first steady stream of gas bubbles is emitted from a wetted filter element under specified test conditions
The temperature and pressure at which part of a liquid begins to convert to gas For example, if a certain volume of liquid is held at constant pressure, but its temperature is increased, a point is reached at which bubbles of gas begin to form in the liquid This is the bubble point Similarly, if a certain volume of liquid is held at a constant temperature but the pressure is reduced, the point at which gas begins to form is the bubble point Compare dew point