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.
A subluxation is a condition that occurs when a joint begins to dislocate. A subluxation is often the result of a traumatic or acute injury. In these cases, a subluxation of a joint can be quite painful. Subluxations may lead to damage of the normal structures that support a joint.