0 in stories and films, a fictional (= invented) substance that can hurt the character Superman, who is extremely strong and not hurt by most things
Let the general price level fall by 10%, leading to a fall in the price of kryptonite futures of 20% and of phlogiston futures of 5%.
Exposure to green kryptonite weakens him, and prolonged exposure would be fatal.
She believed that she couldn't fly due to exposure to red kryptonite which, at the time, was only considered an urban legend.
She instructs him that he is going to tell her how the kryptonite heart functions, which he agrees to do.
Storylines regularly included a villain deriving a power from kryptonite exposure.
He was able to survive exposure to massive amounts of kryptonite radiation.
His kryptonite heart is not in his center, but in the upper left quadrant of his chest.
He finds only gigantic, asteroid-sized chunks of kryptonite, pieces of the planet that were irradiated by the supernova that destroyed the great civilization.
