Longest Word In The World

Sometimes we are thinking about what is the longest word in the world. and I asked myself as it may be the longest word in foreign-languages. There are lots of longest words available but i think the real longest word should be meaningful and still used by people.

So finally I got it and we can technically consider this word as a longest word in the world:
Pneumonoultramicroscopicsilicovolcanoconiosis

This is a longest word by 45 letters which refers to a lung disease caused inhaling silicon dust particles. Research has discovered that this word was originally intended as a hoax. It has since been used in a close approximation of its originally intended meaning, lending at least some degree of validity to its claim.


I found one of the longest place names.
Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu

It's a name of the hill in New Zealand which translates into English as "The brow of the hill where Tamatea, the man with the big knees, who slid climbed and swallowed mountains who is known as the Land Eater, played on his nose flute to his loved one. At 85 letters, it is one of the longest place name in the world. But local peoples typically called just "Taumata" for ease of conversation.

The longest place name in the United States is: Chargoggagoggmanchauggagoggchaubunagungamaugg

It's a name of the lake in Webster, Massachusetts which 45 letters long. It means "Englishmen at Manchaug at the Fishing Place at the Boundary".

People sometimes ask whether a DNA string can be considered as the longest English word. For example below is the so longest word. It contains more then 1900 letters.

MethionylglutaminylarginytyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanyvalylprolylphenylalanylvalythreonylleucylglycylaspartylprolyglycylisoleucylglutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleucylisoleucylglutamylalanylglycylalanylaspartylalanylleucylglutamylleucylglycylglycylisoleucylprolylphenylalanylserylaspartylprolylleucelalanylaspartyglycylprolythreonylisoleucylglutamiylasparaginylalanylthreonylleucylarginylalanylphenylalanylalanylglycylvalyltheonylprolylalanylglutaminylcysteinylphenylalanygllutamylmethionylleucyalanylleucylisoleucylarginylglutaminyllysylhistidylprolylthreonylisoleucylpriIylisoleucylglycylleucylleucylmethionyltyrosylalanylasparaginylleucylvalyphenylalanylasparaginyllysylgyycylisoleucylaspartylglutamylphenylalanyltyrosylalanylgutaminyllcysteinylglutamyllysylvalylglycylavlylaspartylserylvalylleucylvalylalanylaspartylvalyprolylvalylglutaminylglutamyllserylalanyprolyphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginylvaylalanylprolylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucylarginyglutaminylisoleucylalanyylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucylleucylserylarginylalanylglycylvalythreonylglycylalanylglutamylasparaginylarginylanylalanylleucylprolylleucylaspaaginylhistidylleucylvaylalanyllysylleucyllysylglutamyltyrosylasaraginylglycylphenylalanylglycylisoleucylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylalanyglycylalanylalanyglycylalanylisoleucylserylglycyserylalanylisoleucylbalyllsylisoleucylisoleucylglutamyyylglutaminylhistidylasparaginylisoleucylglutamylprolyglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalabylvalylglutaminlylprolylmethionyllysylalanylalanylthreonylarginylserine

It’s the scientific name for Tryptophan synthetase, which is a protein containing 267 amino acids. But technically it's does not qualify as a word. They're regarded as chemical names rather than genuine words in the sense of meaningful items of vocabulary. We don't tend to regard these terms as proper 'words'.

Here are some of the long words from Oxford English Dictionary which are highly technical.

otorhinolaryngological - 22 letters
immunoelectrophoretically - 25 letters
psychophysicotherapeutics - 25 letters
thyroparathyroidectomized - 25 letters
pneumoencephalographically - 26 letters
radioimmunoelectrophoresis - 26 letters
psychoneuroendocrinological - 27 letters
hepaticocholangiogastrostomy - 28 letters
spectrophotofluorometrically - 28 letters
pseudopseudohypoparathyroidism - 30 letters