Is Counter Pressure a Word?

pressure in the opposite direction or with opposing effect.

What does counter pressure mean?

1 : weight or force in a contrary or reverse direction … allow the user to change the firmness of the mattress by adjusting the flow of air, providing a counterpressure to body weight.— Moshe Lewis counterpressure applied to the lower back during labor for pain relief.

Is counter effect a word?

coun·ter·ef·fect.