- Majorly, the longest word in English which refers to a lung disease contracted from the inhalation of very fine silicious particles is a 45-letter word:
“Pneumonoultramicroscopicsilicovolcanoconiosis”
- Technically, the longest word in English which is the chemical name for “Coat Protein, Tobacco Mosaic Virus, Dahlemense Strain”. It’s a 1185-letter word:
“acetylseryltyrosylserylisoleucylthreonylserylprolylserylglutaminyl
phenylalanylvalylphenylalanylleucylserylserylvalyltryptophylalanyl
aspartylprolylisoleucylglutamylleucylleucylasparaginylvalylcysteinyl
threonylserylserylleucylglycylasparaginylglutaminylphenylalanyl
glutaminylthreonylglutaminylglutaminylalanylarginylthreonylthreonyl
glutaminylvalylglutaminylglutaminylphenylalanylserylglutaminylvalyl
tryptophyllysylprolylphenylalanylprolylglutaminylserylthreonylvalyl
arginylphenylalanylprolylglycylaspartylvalyltyrosyllysylvalyltyrosyl
arginyltyrosylasparaginylalanylvalylleucylaspartylprolylleucylisoleucyl
threonylalanylleucylleucylglycylthreonylphenylalanylaspartylthreonyl
arginylasparaginylarginylisoleucylisoleucylglutamylvalylglutamyl
asparaginylglutaminylglutaminylserylprolylthreonylthreonylalanylglutamyl
threonylleucylaspartylalanylthreonylarginylarginylvalylaspartylasparty
alanylthreonylvalylalanylisoleucylarginylserylalanylasparaginylisoleucyl
asparaginylleucylvalylasparaginylglutamylleucylvalylarginylglycyl
threonylglycylleucyltyrosylasparaginylglutaminylasparaginylthreonyl
phenylalanylglutamylserylmethionylserylglycylleucylvalyltryptophyl
threonylserylalanylprolylalanylserine”
- But the longest officially recognized place name, which is a hill in New Zealand. contains 85 letters:
“Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu”