static line
noun
: a cord attached to a parachute pack and to an airplane to open the parachute after a jumper clears the plane
Example Sentences
Recent Examples on the Web The video, according to the Defense Department, shows soldiers from the 82nd Airborne Division performing static line jumps. 
Chiara Vercellone, USA TODAY, 23 Mar. 2022 As the jumper exits the aircraft, the static line pulls the parachutist’s canopy free. Kyle Mizokami, Popular Mechanics, 6 Nov. 2019
Chiara Vercellone, USA TODAY, 23 Mar. 2022 As the jumper exits the aircraft, the static line pulls the parachutist’s canopy free. Kyle Mizokami, Popular Mechanics, 6 Nov. 2019 Word History
First Known Use
1925, in the meaning defined above