Kryptonite

usgb/ˈkrɪptənaɪt/
noun

A fictional mineral in the Superman comic books, it is radioactive and it weakens Superman when he is near it.

Superman's powers are no use when he is in proximity of kryptonite.
Visual representation of "kryptonite" - A fictional mineral in the Superman comic books, it is radioactive and it weakens Superman when he is near it.

Often appears as...

  • green kryptonite
  • exposure to kryptonite
Definition 1 of 2
Visual representation of "kryptonite"
LampPro Tip 1/3

Comic Origin

Understand that kryptonite comes from Superman stories; it's not a real substance.

Illustration for Comic Origin
They joked that his gym shirt was kryptonite to motivation.
LampPro Tip 2/3

Beyond Superman

Be aware, kryptonite references can be used outside comic discussions to imply vulnerability.

Illustration for Beyond Superman
The quiz on 18th-century poets became the students' kryptonite.
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Cultural Impact

Recognize that 'kryptonite' implies an unavoidable weakness, common in pop culture.

Illustration for Cultural Impact
The chef's kryptonite was a well-made cheesecake.
Visual representation of the word "Kryptonite"

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