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9 answers

Pneumonoultramicroscopicsilicovolcanoconiosis 45 letters Longest word in a major dictionary
Technical; coined to be the longest word

Pseudopseudohypoparathyroidism 30 letters
Longest non-coined word in a major dictionary
Technical

Floccinaucinihilipilification 29 letters
Longest nontechnical word

2007-09-14 06:40:43 · answer #1 · answered by Chelsea79 4 · 0 0

Might want to check out this site. According to them there is a work with 189,819 characters. It also provides a list of longest commom word in dictionaries and such

http://en.wikipedia.org/wiki/Longest_word_in_English

Word Length Pros Cons

Methionylthreonylthreonyl...isoleucine 189,819 letters Longest word published[1] Technical; not in a major dictionary; not published seriously

Acetylseryltyrosylseryliso...serine 1185 letters The longest known word ever published in a serious context in an English language publication[2] Technical; not in a major dictionary

Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu 85 letters Longest officially recognized place name[3] Place name; not in a major dictionary

Pneumonoultramicroscopicsilicovolcanoconiosis 45 letters Longest word in a major dictionary[4] Technical; coined to be the longest word

Pseudopseudohypoparathyroidism 30 letters Longest non-coined word in a major dictionary Technical

Floccinaucinihilipilification 29 letters Longest nontechnical word

2007-09-14 06:43:00 · answer #2 · answered by Anonymous · 0 0

There is floccinaucinihilipilification in Webster's and pneumonoultramicroscopicsilicovolcanoconiosis in Oxford, both words in relatively common usage, although the latter is shortened to silicosis or black lung.

For extremely long words, check out Mrs. Byrne's Dictionary of Unusual, Obscure, and Preposterous Words, by Josefa Heifetz Byrne, the famous concert pianist (it's her hobby to collect odd words). In it you will find the word for the tryptophan synthesase A protein, a 1913 letter chemical name.

2007-09-14 06:43:28 · answer #3 · answered by ianmacpherson55 3 · 0 0

It's antidisestablishmentarianism. The one others have mentioned is pneumonoultramicroscopicsilicovolcanoconiosis. I've discovered that Yahoo! Answers won't show the whole word for some reason, so I'll split it in two:

volcanoultramicroscopic
silicovolcanoconiosis

2007-09-14 06:40:13 · answer #4 · answered by neniaf 7 · 0 0

You're thinking of antidisestablishmentarianism (28 letters). Even longer is "antidisestablish mentarianistically" (34). "pneumonoultramicrosco picsilicovolcanoconiosis" (45 letters) - this word was originally created as a hoax.

Sorry these words are broken into two - it wouldn't post them as one single word on this board, but they are just one word each.

2007-09-14 06:43:55 · answer #5 · answered by sila 2 · 0 0

PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS (45 letters; a lung disease caused by breathing in certain particles) is the longest word in any English-language dictionary. (It is also spelled -koniosis.)

2007-09-14 06:39:40 · answer #6 · answered by melodyahol 6 · 0 0

don't know that one but I do know that the sentance

the quick brown fox jump over the lazy dog uses every letter of the alphabet.

2007-09-14 06:40:04 · answer #7 · answered by Anonymous · 0 0

pneumonoultramicroscopicsilicovolcanoconiosis

this is a 45 letter lung disease

2007-09-14 06:39:58 · answer #8 · answered by Soda 4 · 0 0

the word you are looking for is antidisestablishmentarianism...but i am not sure it is the longest one.

2007-09-14 06:39:32 · answer #9 · answered by chris m 5 · 0 0

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