Kryptonite is a fictional material that appears primarily in Superman stories published by DC Comics. In its best-known form, it is a green, crystalline material originating from Superman's …

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Kryptonite is the name given to shards of matter that were cast off from the planet Krypton after its destruction.

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The meaning of KRYPTONITE is a substance that causes the comic-book character Superman to become weak when he is exposed to it—often used to describe something likened to …

Aug 11, 2025 · Kryptonite is an irradiated piece of crystal from his homeworld of Krypton, which causes physiological changes to any Kryptonian in close proximity. Like the multiple versions …

Oct 9, 2023 · Kryptonite is a radioactive ore from Superman's home world, Krypton. Kryptonite usually only affects Kryptonians, and it's one of the only things in DC that can weaken …

Jul 18, 2025 · Kryptonite is a fictional mineral from Superman’s home planet, Krypton. When Krypton exploded, radioactive fragments of the planet were scattered across space. These …

For 82 years, Kryptonite has been the bane of the Man of Steel’s existence, serving as his ultimate weakness. But that's all about to change.

May 29, 2025 · People would first get to know Kryptonite through the popular Adventures of Superman radio serial, in the 1943 episode, “The Meteor from Krypton.” Six years later, …