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.
The patient with patellar subluxation freÂ­quently complains of apprehension and limitation in sports because of the feeling of inÂ­security or instability. Episodes of giving way are common, and effusion will frequently accompany such episodes.