What is the longest word within the Oxford English Dictionary?

Question

I found out that the longest place name in the world is in Thailand. AND I found out that supercalifragilisticexpialidocious is a legitimate word (on Dictionary.com), but it's not in the OED.

What is the longest word in the dictionary? Serious answers, please. I don't want to hear "smiles", because there's a mile between the "S"'s. That joke went out like the dinosaurs.

Answer 1

How about:

Supercalifragilisticexpialidocious!

worked for mary poppins...

Answer 2

The longest word officially in english is the name of a chemical, i think it's a protein and is 1400 charecters long the longest "common word" is often taken to be anti-disestablishmentarianism which was a joke word coined over a 100 years ago meaning to be against the the destruction of the church/royalty

Answer 3

Floccinaucinihilipilification, longer by one letter than antidisestablishmentarianism

The Oxford English Dictionary classifies it as 'humorous' and with 29 letters it is the longest words in the English language that can be used in everyday speech, unlike pneumonoultramicroscopicsilicovolcanoconiosis, and other highly specific scientific words.
Hope this helps

Answer 4

Antidisestablishmentarianism

Answer 5

Antidisestablishmentarianism

Answer 6

pneumonoultramicroscopicsilicovolcanoconiosis is the longest semi made up word in the dictionary. It is a type of lung disease.

The longest words which use letters just once are uncopyrightable and dermatoglyphics.

Answer 7

pneumonoultramicroscopicsilicovolcanoconiosis

noun (NOO-muh-noh-UL-truh-MY-kruh-SKOP-ik-SIL -i-koh-vol-KAY-no-KOH-nee-O-sis, nyoo-)

A lung disease caused by inhaling fine particles of silica.

[From New Latin, from Greek pneumono- (lung) + Latin ultra- (beyond, extremely) + Greek micro- (small) + -scopic (looking) + Latin silico (like sand) + volcano + Greek konis (dust) + -osis (condition).]

Even though we have included the pronunciation of this word, we advise caution lest you may have to avail the services of an otorhinolaryngologist (ear, nose, and throat specialist).

Answer 8

Chemical Terms
Two chemical terms (3,641 and 1,913 letters long) have appeared in the Guinness Book of World Records. They were withdrawn because they have never been used by chemists, and there is no theoretical limit to the length of possible legitimate chemical terms. A DNA molecule could have a name of over 1,000,000,000 letters if it was written out in full. ACETYL­SERYL­TYROSYL­SERYL­ISO­LEUCYL­THREONYL­SERYL­PROLYL­SERYL­GLUTAMINYL­PHENYL­ALANYL­VALYL­PHENYL­ALANYL­LEUCYL­SERYL­SERYL­VALYL­TRYPTOPHYL­ALANYL­ASPARTYL­PROLYL­ISOLEUCYL­GLUTAMYL­LEUCYL­LEUCYL­ASPARAGINYL­VALYL­CYSTEINYL­THREONYL­SERYL­SERYL­LEUCYL­GLYCYL­ASPARAGINYL­GLUTAMINYL­PHENYL­ALANYL­GLUTAMINYL­THREONYL­GLUTAMINYL­GLUTAMINYL­ALANYL­ARGINYL­THREONYL­THREONYL­GLUTAMINYL­VALYL­GLUTAMINYL­GLUTAMINYL­PHENYL­ALANYL­SERYL­GLUTAMINYL­VALYL­TRYPTOPHYL­LYSYL­PROLYL­PHENYL­ALANYL­PROLYL­GLUTAMINYL­SERYL­THREONYL­VALYL­ARGINYL­PHENYL­ALANYL­PROLYL­GLYCYL­ASPARTYL­VALYL­TYROSYL­LYSYL­VALYL­TYROSYL­ARGINYL­TYROSYL­ASPARAGINYL­ALANYL­VALYL­LEUCYL­ASPARTYL­PROLYL­LEUCYL­ISOLEUCYL­THREONYL­ALANYL­LEUCYL­LEUCYL­GLYCYL­THREONYL­PHENYL­ALANYL­ASPARTYL­THREONYL­ARGINYL­ASPARAGINYL­ARGINYL­ISOLEUCYL­ISOLEUCYL­GLUTAMYL­VALYL­GLUTAMYL­ASPARAGINYL­GLUTAMINYL­GLUTAMINYL­SERYL­PROLYL­THREONYL­THREONYL­ALANYL­GLUTAMYL­THREONYL­LEUCYL­ASPARTYL­ALANYL­THREONYL­ARGINYL­ARGINYL­VALYL­ASPARTYL­ASPARTYL­ALANYL­THREONYL­VALYL­ALANYL­ISOLEUCYL­ARGINYL­SERYL­ALANYL­ASPARAGINYL­ISOLEUCYL­ASPARAGINYL­LEUCYL­VALYL­ASPARAGINYL­GLUTAMYL­LEUCYL­VALYL­ARGINYL­GLYCYL­THREONYL­GLYCYL­LEUCYL­TYROSYL­ASPARAGINYL­GLUTAMINYL­ASPARAGINYL­THREONYL­PHENYL­ALANYL­GLUTAMYL­SERYL­METHIONYL­SERYL­GLYCYL­LEUCYL­VALYL­TRYPTOPHYL­THREONYL­SERYL­ALANYL­PROLYL­ALANYL­SERINE = Tobacco Mosaic Virus, Dahlemense Strain. (1,185) This word has appeared in the American Chemical Society's Chemical Abstracts and is thus considered by some to be the longest real word.

Answer 9

I always thought it was antidisestablishementarianism, (28)but then I heard of floccinaucinihilipilification, (29)

Answer 10

Antidisestablishmentarianism.

Meaning........opposed to the belief that there should no longer be an official church of the country.

Answer 11

PNEUMONO­ULTRA­MICRO­SCOPIC­SILICO­VOLCANO­CONIOSIS.

(a lung disease caused by breathing in particles of siliceous volcanic dust.)

But, it's too long even for Yahoo to show it all in this window. Look it up on the net.