My Dr. Said I had one today. I have just recently had lung surgery and am in healing stage. Anyway, it is when the lung in inflamed and rubs against the chest wall when breathing. It makes a rubbing sort of sound, hence the reason they call it a rub. Usually there is a dull ache/pain where the rub is. It can be in one or more parts of the lung. I was given Prednisone to help get rid of the rub.
Pleurisy also causes a chest noise that ranges from a faint squeak to a loud creak. This characteristic sound is called a "friction rub."
It prevents a pleural friction rub. Its like a lubricant for the lungs to move up and down without any friction.
A synonym for friction would rub. :DA synonym for friction would rub. :D
kinetic friction
To rub
An example of friction is when you rub your hands together or when you rub two sticks together it makes fire
Rub things
rub harder
Friction
bad friction is when 2 things rub together .
Friction
it causes friction
Friction makes things (like soles) rub away