PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS (also
spelled PNEUMONOULTRAMICROSCOPICSILICOVOLCANOKONIOSIS - 45 letters
meaning :-a lung disease caused by breathing in particles of siliceous
volcanic dust.
HEPATICOCHOLANGIOCHOLECYSTENTEROSTOMIES - 37
letters
meaning :- a surgical creation of a connection between the gall
bladder and a hepatic duct and between the intestine and the gall
bladder.
SUPERCALIFRAGILISTICEXPIALIDOCIOUS - 34
letters
meaning :- song title from the Walt Disney movie Mary Poppins.
HIPPOPOTOMONSTROSESQUIPEDALIAN - 30
letters
meaning :- pertaining to a very long word.
From Mrs. Byrne's Dictionary of Unusual, Obscure and
Preposterous Words
FLOCCINAUCINIHILIPILIFICATION -29
letters
meaning:-an estimation of something as worthless
ANTIDISESTABLISHMENTARIANISM - 28
letters
meaning :- the belief which opposes removing the tie between church
and state.
HONORIFICABILITUDINITATIBUS
- 27 letters
meaning: - honorableness.
ELECTROENCEPHALOGRAPHICALLY - 27 letters
meaning:- The longest unhyphenated word in Merriam-Webster's Collegiate
Dictionary (10th Ed.), joint with ethylenediaminetetraacetate
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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They were withdrawn because they have never been used by chemists, and there is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.
ACETYLSERYLTYROSYLSERYLISOLEUCYLTHREONYLSERYLPROLYLSERYLGLUTAMINYLPHENYLALANYLVALYLPHENYLALANYLLEUCYLSERYLSERYLVALYLTRYPTOPHYLALANYLASPARTYLPROLYLISOLEUCYLGLUTAMYLLEUCYLLEUCYLASPARAGINYLVALYLCYSTEINYLTHREONYLSERYLSERYLLEUCYLGLYCYLASPARAGINYLGLUTAMINYLPHENYLALANYLGLUTAMINYLTHREONYLGLUTAMINYLGLUTAMINYLALANYLARGINYLTHREONYLTHREONYLGLUTAMINYLVALYLGLUTAMINYLGLUTAMINYLPHENYLALANYLSERYLGLUTAMINYLVALYLTRYPTOPHYLLYSYLPROLYLPHENYLALANYLPROLYLGLUTAMINYLSERYLTHREONYLVALYLARGINYLPHENYLALANYLPROLYLGLYCYLASPARTYLVALYLTYROSYLLYSYLVALYLTYROSYLARGINYLTYROSYLASPARAGINYLALANYLVALYLLEUCYLASPARTYLPROLYLLEUCYLISOLEUCYLTHREONYLALANYLLEUCYLLEUCYLGLYCYLTHREONYLPHENYLALANYLASPARTYLTHREONYLARGINYLASPARAGINYLARGINYLISOLEUCYLISOLEUCYLGLUTAMYLVALYLGLUTAMYLASPARAGINYLGLUTAMINYLGLUTAMINYLSERYLPROLYLTHREONYLTHREONYLALANYLGLUTAMYLTHREONYLLEUCYLASPARTYLALANYLTHREONYLARGINYLARGINYLVALYLASPARTYLASPARTYLALANYLTHREONYLVALYLALANYLISOLEUCYLARGINYLSERYLALANYLASPARAGINYLISOLEUCYLASPARAGINYLLEUCYLVALYLASPARAGINYLGLUTAMYLLEUCYLVALYLARGINYLGLYCYLTHREONYLGLYCYLLEUCYLTYROSYLASPARAGINYLGLUTAMINYLASPARAGINYLTHREONYLPHENYLALANYLGLUTAMYLSERYLMETHIONYLSERYLGLYCYLLEUCYLVALYLTRYPTOPHYLTHREONYLSERYLALANYLPROLYLALANYLSERINE
- 1185 letters !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
meaning - Tobacco
Mosaic Virus, Dahlemense Strain.
This word has appeared in the American
Chemical Society's Chemical Abstracts and is thus considered by some to be the
longest real word.
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