Did you perhaps mean krypton?
Definitions
Wiktionary
- n. The one weakness of something or someone that is otherwise invulnerable, an Achilles' heel.
Etymologies
- From a fictional radioactive element, kryptonite, that has a detrimental effect on the otherwise invulnerable character Superman. Apparently formed as krypton + -ite. (Wiktionary)
Examples
“DC owns other elements like Superman’s ability to fly, the term kryptonite, the Lex Luthor and Jimmy Olsen characters, Superman’s powers and expanded origins.”
Look, it’s Intellectual Property Man!: If only ideas really were bulletproof « The Retort
“DC Comics and Warner Brothers will retain rights toother elements like Superman’s ability to fly, the term kryptonite, the Lex Luthor and Jimmy Olsen characters, Superman’s powers and expanded origins.”
What Does Superman Origin Rights Loss Mean to Superman Film Future? Smallville and Others?
“(As Larry Elder would say, facts are to liberals what kryptonite is to Superman.)”
Coyote Blog » Blog Archive » This Is Pretty Funny, in a Sad Way
“The "bad" Superman created by the red kryptonite is the incarnation of Superman's buried resentments at having to be Superman all the time.”
“Occasionally getting caught in kryptonite traps or other traps making her powerless.”
First Look: SMALLVILLE’S SuperGirl Laura Vandervoort | the TV addict
“His kryptonite is Captain Liberty, the government’s number one weapon on the battle against supervillains.”
“~ Scientists find mineral just like Superman's 'kryptonite' -- "A newly-found mineral contains the same elements described in the fictional kryptonite used by the enemies of comic-book and film superhero "Superman," a scientist said Tuesday.”
“In a recent episode, Penny won a psychological battle with the help of Leonard, who revealed his roommate's "kryptonite": fear of his mother.”
“Not to belabor the point because it's a moot discussion at this point, but MJ didn't have a "kryptonite" flaw.”
“Logic, economic comfortability, educated persons are "kryptonite" to them.”
Lists
These user-created lists contain the word ‘kryptonite’.
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Ponderable Plant Names
List of plant names (common or scientific) that go trippingly off the tongue, are fun to contemplate, expose the wit of the namer, or just plain befuddle.
tongueshape mudmi..., glandular maiden ..., jeweled maiden fern, stately maiden fern, hairy maiden fern, downy maiden fern, widespread maiden..., turkey tangle fog..., yankeeweed, clitoria fragrans, clitoria mariana, tall tumblemustard and 261 more...
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Not in the Periodic Table
Words that sound like they might be the names of elements of the periodic table, but that aren't. Many of the words listed here were actually proposed as names for substances their creators thought...
tentorium, columbarium, nasturtium, deuterium, caladium, valerian, concordium, synangium, chorium, geranium, hymenium, pyrenium and 310 more...
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gcherches's Words
serendipity, roadrunner, inner child, coagulant, esquire, vicissitude, idiot savant, mitigation, affirmation, affirmative, diatribe, affirmative action and 185 more...
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curligirli0's Words
crapulous, swish, shiatsu, zen, xenoglossy, nincompoop, loquacious, pianissimo, onomatopoeia, imperturbable, silky, hosanas and 379 more...
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uncleosbert's Words
omphalaskepsis, gravid, steatopygian, marmalade, triffid, scurrilous, kith, lilliputian, slunk, snailular, milquetoast, elephantine and 191 more...
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gorgonglare's list
the best
zeppelin, ion, laconic, serendipity, cataract, saturnine, syzygy, cinnabar, bistro, lithium, paroxysm, scion and 694 more...
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Superwords
Look, up in the dictionary! It's words coined in or popularized by Superman comics and other media.
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faint sausage stargazer
Interesting gene names
sonic hedgehog, lunatic fringe, methuselah, dreadlocks, tinman, inebriated, swiss cheese, stargazer, headcase, faint sausage, fear of intimacy, van gogh and 11 more...
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Science Fiction Double Feature
cyberpunk, postcyberpunk, sci-fi, steampunk, techsploitation, dystopia, transhumanism, posthuman, future, skiffy, comlink, transmogrifier and 38 more...
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Smallville
words relating to the TV show Smallville (the early years of Clark Kent!)
fly, friends, lies, super, shelby, daily planet, save, kansas, cornfields, barn, mansion, wall of weird and 74 more...
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portablec's Words
jawbreaker, narnad, pax, chaw, vealpie, saltherring, decisive, rummaged, raggedy, trifle, scribblement, numskull and 50 more...
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What superheroes are made of
Or, sci-fi invented elements
Tweets
Looking for tweets for kryptonite.

hernesheir Name of a gene in the plant Arabidopsis that supresses the superman gene. Jun 28, 2010