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.
Below are some of the common causes for elbow bursitis. 1  Repetitive strain and stress to the elbow such as from playing sports, lifting weights or resting elbows on hard surfaces for long periods of time. 2  Sudden impact such as from a fall, sports injury or an accident. 3  Natural wear and tear of the elbow joint.