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 home world of …

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 kryptonite in …

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

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 Superman enough for …

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 of Superman …

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 remnants, …

Jul 7, 2025 · Here’s our list of the different types of Kryptonite in the DC Comics Universe, along with their effects on Superman and others. It should be noted, this list only includes Kryptonite that is...

This radioactive debris became known as Green Kryptonite, or simply kryptonite, and it is deadly to super-powered Kryptonians. It does not react with oxygen, so it does not combust when it enters …

Kryptonite is a fictional element in the DC Comics universe, and one of the few items that can harm Superman, his cousin Supergirl, and his dog Krypto. It is depicted as a radioactive fragment from the …

The origins of kryptonite can be traced back to the first "Superman" story by Jerry Siegel and Joe Shuster. "The Reign of the Superman" was printed in Science Fiction: The Advance Guard of Future …