Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The one weakness of something or someone that is otherwise invulnerable, an Achilles' heel.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From a fictional radioactive element, kryptonite, that has a detrimental effect on the otherwise invulnerable character Superman. Apparently formed as krypton +‎ -ite.

Examples

Comments

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  • Name of a gene in the plant Arabidopsis that supresses the superman gene.

    June 28, 2010