Definitions
Wiktionary
- n. nonce word A factitious disease of the lungs, allegedly caused by inhaling microscopic silicate particles originating from eruption of a volcano.
Examples
“pneumonoultramicroscopicsilicovolcanoconiosis' or something like xenophobia? contact me anything related to:”
“The longest word in the English language, according to the Oxford English Dictionary, is pneumonoultramicroscopicsilicovolcanoconiosis.”
“The notes spelled out a very long word: pneumonoultramicroscopicsilicovolcanoconiosis.”
“The article to which you like justly dismisses pneumonoultramicroscopicsilicovolcanoconiosis as a hoax, and floccinaucinihilipilification as a mere stunt word, but then goes on to dismiss antidiestablishmentarianism on the grounds that it “has become limited to simply yet another example of a very longword”.”
“Một ngày nào đó tôi sẽ nhận được xung quanh để một bài luận về có vẻ như nhà mô phạm pneumonoultramicroscopicsilicovolcanoconiosis .”
“Spellers have listed tchotchke, pneumonoultramicroscopicsilicovolcanoconiosis and weissnichtwo as some of their favorite words.”
“People would suffer from pneumonoultramicroscopicsilicovolcanoconiosis (or really what it is called "silicosis" LOL) and eventually die.”
“a quick and vague summarization ... * damn, what a long-ass word* pneumonoultramicroscopicsilicovolcanoconiosis”
“One day I’ll get around to another pedantic essay about pneumonoultramicroscopicsilicovolcanoconiosis.”
“Dr. H.M. Truby reports that pneumonoultramicroscopicsilicovolcanoconiosis, with 45 letters, is outranked by aequeosalinocalcalinoceraceoaluminosocupreovitriolic, with 52 letters.”
Lists
These user-created lists contain the word ‘pneumonoultramicroscopicsilicovolcanoconiosis’.
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Interesting words
A list of words that are odd or words that I have looked up.
concupiscence, brize, scree, scoria, forestaff, spanaemia, valetudinarianism, distasture, pyrethrum, laudanum, gentian, bicameral and 11184 more...
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infin8y's list
words i love
paradox, relativity, perspective, truth, shiiin, effervescent, aureole, love, hope, crystalline, tranquillity, pneumonoultramicr...
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Supercalifragilisticexpialidocious
inniminideciminio..., phantabulous, hotdiggedeedog, soooooeeeeee, pneumonoultramicr..., honorificabilitud..., eckyeckyeckyeckyp..., twitterpated, preantepenultimate, dociousaliexpiist..., squiddiddiddity
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Talking About Words
The favorite words of Talking Tyrants
dolorous, parsimonious, apotemnophilia, odalisque, tuberoinfundibular, morass, ostentatious, sybaritic, vermilion, onomatopoeia, eschatology, teleology and 49 more...
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list01
I HEART MYSELF!!!!!!!!!!
clitoridectomy, pneumonoultramicr..., deipnosophist, zenana, quadragintesimal, lampadedromy, fundus, karyokinesis, machicolation, plasmapherisis, entomophagous, oxyopia and 36 more...
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Super Long Words
A list of words that contain at least 10 or more letters.
antidisestablis..., supercalifragi..., pneumonoultrami..., hepaticocholangi..., hippopotomonstro..., floccinaucinihi..., honorificabilit..., electroencephalo..., antitransubstan..., ) disproportion..., incomprehensib..., tetramethyldiam... and 44 more...
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Yes We Can
can-, -can, or even -can-.
candelabra, parcan, incantation, Canada, candida, Candide, toucan, can-can, cancan, cannabis, incandescent, canticle and 26 more...
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Best words ever
The most awesome words.
abacot, aristology, autohagiography, backronym, bafflegab, bodacious, boustrophedonic, brobdingnagian, bromopnea, cachinnatory, dactylonomy, eagre and 26 more...
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Big Long Words
Words that give thee the power to dominate all others.
pnuemonoultramicr..., antidisestablishm..., antidisestablishm..., encephalopathic, serendipitous, serendipitous, oxyphenbutazone, deshypothequiez, verisimilitude, subinfiniplastifu..., eckyeckyeckyeckyp..., hippopotomonstros... and 4 more...
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nebula601's list
My name is Frank.
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bintalshamsa's list
My Favorite Words
weltschmerz, perspicacity, idée fixe, invigilator, salubrious, tchotchke, ex nihilo, invidious, malapropism, naïve, sardonic, elide and 1402 more...
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parlerodermime's Words
loquacious, orange, lackadaisical, rhythm, esoterrorist, contrary, enchanted, extraordinary, nymph, chatter, incessant, time and 168 more...
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Very long words I'll never use
seriously though.
hypoparathyroidism, Gewürztraminer, tuberoinfundibular, pneumonoultramicr..., electronystagmogr...
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C. S. Bird – Grandiloquent Dictionary
All the words from the Grandiloquent Dictionary.
946 of these 2700 words do not yield any results in six different dictionaries, hence many of them might be misspellings.
More in...abacinate, abcedarian, abderian, ablegate, abligurition, ablutophobia, abnormous, acarophobia, acathasia, accipitrine, accidia, accubitus and 2690 more...
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Suchlongwordswithsomanyletters.
Hoarded.
chargoggagoggmanc..., aquaethylenediami..., taramasalata, palaeacanthocephala, tathagatagarbha, tarantarratara, adamantoblastomata, astragalocalcaneal, calcaneoastragalar, hubbubbubboo, flibbertigibbet, bubbybush and 330 more...
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bloodworm's list
These are words that I enjoy because they are unique, rare, long, or just cool.
circumlocution, hysteresis, schadenfreude, quixotic, loquacious, ennui, sesquipedalian, defenestrate, obfuscate, syzygy, ubiquitous, superfluous and 231 more...
Tweets
Looking for tweets for pneumonoultramicroscopicsilicovolcanoconiosis.

rsure1 Longest Word EVER May 22, 2013
reesetee Jumbo shrimp can't complain. They're a contradiction in terms. Jan 20, 2011
ruzuzu Oh! But what about a jumbo shrimp? Jan 20, 2011
ruzuzu Not that mantis shrimp are actually shrimp. Jan 20, 2011
ruzuzu A mantis shrimp might, but regular shrimp probably wouldn't. Jan 20, 2011
reesetee Or shrimp. But they wouldn't need this much space, would they? Jan 19, 2011
ruzuzu You know... like scallops. Jan 19, 2011
ruzuzu All this space--it feels almost decadent! Jan 19, 2011
reesetee Hi ruzuzu!
*waves back*
See? Our incredibly long screen names are welcome here. Jan 19, 2011
ruzuzu Hi reesetee!
*waves*
(see gemsbok) Jan 18, 2011
john You can see scans of the dictionary entry for this here. Jun 19, 2010
auwords Of the words which might be associated with Eyjafjallajökull, this one seems to be missing. Imagine the health effects of all that volcanic ash! May 10, 2010
PossibleUnderscore It's technically the longest English word because it can be found in a dictionary. (Oxford, I think.) Jul 14, 2009
jmjarmstrong JM notes that "pneumonoultramicroscopicsilicovolcanoconiosis" occurs chiefly as an instance of a very long word. Feb 1, 2009
oroboros Just learned this from Chris Cole's Wordplay, p. 106:
"...it turns that this word is a hoax perpetrated by the members of the National Puzzlers' League, the world's oldest wordplay association. The word is unknown to medical science. The League President (Everett M. Smith) coined the word at the 103rd meeting of the League, held on February 22, 1935 in New York City. It was picked up by a newspaper reporter for the Herald Tribune and printed the next day in the headline of an article on the League meeting. Frank Scully, author of a series of puzzle books and later one of the early UFO enthusiasts, read the newspaper article and repeated the word in Bedside Manna: The Third Fun in Bed Book (Simon and Schuster, 1936, p. 87). On the strength of this citation, League members (with a wink from the editors?) got the word into both the OED Supplement and Webster's Third. There it remains even to this day." May 24, 2008
harpsdesire Actually, MDWriter... it DOES rhyme with those things. XD May 1, 2008
cathari That is my favourite long word. :) Oct 31, 2007
mdwriternm I think it was originally the title of a song in "Mary Poppins" but was replaced because it didn't rhyme with "precocious" and "atrocious." Of course, I could be wrong about that. Oct 25, 2007
skipvia Plus, it's easier to say "respiratory difficulties due to inhalation of volcano dust." Oct 19, 2007
uselessness I learned to say it fast back in third grade, and thought I had "arrived" in the world of intelligence. After a while I realized that doing so is an impressive -- but hollow -- way to dork out, and serves little purpose beside that. It's also an extremely effective way to make your friends think you're a pretentious snot. :-P Oct 19, 2007
arby Oh, now you're just showing off. Jun 4, 2007
somern My 8th grade Social Studies teacher, Ms. Elliott, taught us this word. She died later that year in a car accident. Jan 10, 2007
zanshin My 4th grade teacher, Mrs. Davis, taught us pneumonoultramicroscopicsilicovolcanoconiosis as an exercise in memorization. She's also the one who taught me ghoti as a phonetic spelling for fish. Dec 12, 2006
brandelion that's one helluva word. Dec 9, 2006
oroboros Longest word in the OED. Meaning: respiratory difficulties due to inhalation of volcano dust. Dec 1, 2006