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.
Medial patella subluxation is denned as excessive medial patella translation that re-creates a sense of pain, popping or instability. This entity was first described by Hughston and Deese in patients with previous arthroscopic lateral retinacular release (and associated vastus lateralis release).