kryptonite

• n. 氪星石

可能来自Krypton和meteorite的合成词。Krypton为漫画中超人所在的外星家园，可能因其充满气体氪或因其隐藏难发现而得名，meteorite,陨石。参照百度百科。

kryptonite (n.)

fictional substance in the "Superman" series, where it weakens the otherwise invulnerable hero, 1943; perhaps from elements of krypton (which is a gas) + meteorite.