Definitions
Century Dictionary and Cyclopedia
- Of, pertaining to, or resembling in character the spirit Mephistopheles; diabolical; sardonic; jeering; irreverent.
WordNet 3.0
- adj. showing the cunning or ingenuity or wickedness typical of a devil
Examples
“Senate Republicans, if handed a recommendation to impeach by the House will be faced with a very tough choice as the world watches them confront a most stubborn, arrogant and unrepentent Connecticut Cowboy President and his mephistophelian inner circle:”
“Thanks to Fish Griwkowsky for this video clip, which features an MSNBC commentator denouncing the mephistophelian Ann Coulter in stunningly strong terms.”
“But a certain sneering humor, a certain mephistophelian irony, in these persons, prevent one from feeling entirely at ease with them, or believing, in fact, in their complete sincerity.”
“The front view of his head is a bit mephistophelian, for it is drawn upward into two horny spines; but the side view recalls a little girl with her hair brushed very tightly up and back from her face.”
“They were almost mephistophelian, and unpleasantly noticeable, drawn thus nearer to the wide wave of her white hair.”
Lists
These user-created lists contain the word ‘mephistophelian’.
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Adjectival Arcana
A roster of adjectives that infrequently surface in typical conversation and writing. Many are dredged from scientific or other technical jargon or sieved from examples of disused archaic forms.
unitegmic, acaulescent, reticuloendothelial, ingressive, uniate, acanthopterygian, ossific, epiphysial, perivisceral, acœlomatous, cestoid, acælomate and 7762 more...
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Words which would do well to assimilate into my...
necronym, paronym, oronym, blandiloquence, grandiloquence, gaudiloquent, fecund, anagogy, horrisonous, homosporous, extraneous, mephistophelian and 1 more...
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Higgledy-Piggledy
Useful double dactyls
antediluvian, post-penitentiary, anthropomorphic, non-complimentary, polyprogenitor, metapoetical, non-tautological, not unintelligent, donor-dysfunctional, eeksily-peeksily, phantasmagorical, plenipotentiary and 82 more...
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Double Dactyls
http://en.wikipedia.org/wiki/Double_dactyl
http...antediluvian, incontrovertible, incontrovertible, gubernatorial, microanatomy, higgledy piggledy, valedictorian, lexicographical, animadversional, labiovelarize, sesquipedalian, fan-fucking-tastical and 86 more...

chained_bear Alt. spelling mephistophelean.
Hey... doesn't someone (or several someones) have a list of adjectives derived from proper names? Mephistopheles is a proper name... Oct 3, 2008