Chord

• A chord is a geometric figure.
• In reference to aircraft, chord refers to the distance between the front and back of a wing, referred to as the leading and trailing edges, measured in the direction of the normal airflow. The term chord was selected due to the curved nature of the wings surface. See chord (aircraft)
• In music theory a chord is a number of pitches, usually at least three, sounded simultaneously (or nearly so). Some particular kinds of chord are named according to the notes of the scale that they contain.
• Chord is a distributed hash table-based file sharing network.