What is the name of the device that creates the Genesis Planet in Star Trek III?

The Genesis Device creates the Genesis Planet in Star Trek III: The Search for Spock.

The device is a terraforming technology developed by the Federation science team led by Dr. Carol Marcus. When activated, it rapidly transforms a lifeless environment into a living ecosystem, which is why the resulting world becomes known as the Genesis Planet.

The technology was introduced in Star Trek II: The Wrath of Khan, where it was presented as a potentially revolutionary scientific tool. Its destructive potential becomes clear when the Genesis effect interacts with matter aboard the USS Reliant and later reshapes a planetary body.

In The Search for Spock, Klingon commander Kruge seeks the technology because he believes it could be used as a weapon. The film was released in 1984 and connects the device's scientific promise to a conflict involving the Enterprise crew and Spock's rebirth.