Definition of phlegm for English Language Learners. : 1  a thick, yellowish liquid that is produced in the nose and throat especially when a person has a cold. : 2  calmness in a difficult or unpleasant situation.
Kneecap (Patellar) Subluxation. A subluxing patella (kneecap) is a temporary, partial dislocation of the kneecap from its normal position in the groove in the end of the thigh bone (femur). This groove is located between two bumps at the end of the thigh bone called the femoral condyles.
Patella dislocation refers to when the kneecap is completely displaced out of its normal alignment. The most common direction for a patella to dislocate is outwardly (laterally). When this happens, the muscles and ligaments on the inside of the knee become overstretched and damaged. Patella subluxation refers to when the kneecap is partially displaced out of its normal position. What Causes Patella Dislocation? Dislocation of the patella is primarily caused by a traumatic incident (often twisting or a direct blow) to the knee.