Definitions for "Return stroke"
The luminous lightning stroke that propagates upward from the earth to the base of a cloud.
The luminous lightning stroke that travels upward from the Earth to the base of the cloud.
Return strokeā€ is also a more broadly applied term referring to the back and forth zigzag line commonly seen in drawings and certain printmaking techniques. It is important to appreciate that when handling a drawing implement such as pencil or pen, or a printmaking tool such as a drypoint needle or etching needle, the tool can be moved freely in every direction and produce a truly continuous zigzag line. When engraving, the hand cannot move freely in every direction and typically the burin (or gravure) is only pushed in one direction; change in direction is accomplished by turning or shifting the plate with the other hand.
The retraction of the actuator shaft as a result of a signal from the controller decreasing below the opposing force of the spring.