Physics. the distance, measured in the direction of propagation of a wave, between two successive points in the wave that are characterized by the same phase of oscillation. on the same wavelength, in sympathy or rapport: We seemed to be on the same wavelength from the moment we met.
Causes of Elbow Pain. Elbow pain is sometimes due to arthritis, but in general, most elbow pain results from overuse injuries. Sports or any activities and professions that require repetitive hand, wrist or arm movements are more prone to elbow injury. Common causes of elbow pain are bursitis, elbow strains, and arthritis.
Elbow pain can be caused by many problems. A common cause in adults is tendinitis. This is inflammation and injury to the tendons, which are soft tissues that attach muscle to bone. People who play racquet sports are most likely to injure the tendons on the outside of the elbow. This condition is commonly called tennis elbow.