" smiles " is the longest
:D
The longest word in English dictionaries is:
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.)
This Is The The Longest Word In The English Language :
Methionylglutaminylarginyltyrosylglutamylserylleucylphen-
ylalanylalanylglutaminylleucyllysylglutamylarginyllysylgluta-
mylglysylalanylphenylalanylvalylprolylphenylalanylyalylthre-
onylleucylglcycylaspartylprolylglicylisoleucyglutamylgluta-
minlserylleucyllysylisoleucylaspartylthreonylleucylisoleu-
cylglutamylalanylglyclyalanylaspartylalanylleucyglutamylle-
ucylgluycylisoleucylproluylphenylalanyserylaspartyprolylleu-
celalanylaspartylglycylprolylthreonylisolleucyglutaminylaspa-
raginylalanythreonylleucylarginylalanylphenylalanylalanylal-
anylglycylvalylthreonylprolylalanylglutaminylcysteinylphen-
ylalanylglglutamylmethionylleucyalanylleucylisoleucylarginyl-
glutaminyllysylhistidylprolyuthreonylisoleucylprolylisoleuc-
ylglycylleucylleucylmethionyltyrosylalanylasbaraginylleucyl-
valylphenylalanylsparaginyyllysylglycylisoleucylaspartylglut-
amylphenylalanylyltyrosylalanylglutaminylcysteinylglutamyll-
ysylvalylglycylvalylspartylserylvalylleucylvallalanylaspart-
ylvalylprolylvalvlglutaminylglutamylserylalanylprolylpheny-
lalalrginylglutaminylalanylalanylleucylarginylhistidylasp-
araginylvalylalalprolylisoleucylphenylalanylisoleucylcystei-
nylprolyprolylaspartylalanylaspartylaspartyspartyleucylle-
ucylarginylglutaminylisoleucylalanylseryltyroslglycylargin-
ylglycyltyrosylthreonyltyrosylleucylleucylserylarginlalanyl-
glycylvalylthreonylglycylalanylglutamylasparaginylarginyla-
nylalanylleucylprolylleucylaspaaginylhistidylleucylvalylalan-
yllysylleucyllysylglutamyltyrosylasparagimylalanylalanypro-
lylprolylleucylglutaminylglycylphenlalanylglycylisoleyucyls-
erylalanylprolylaspartylglutaminylvalyllysylalanylalanylisol-
eucylalspartylalanylglycylalanylalanylglycylalanylasoleucylse-
rylglycylserylalanylisoleucylbalyllysylisoleucylisoleucylgluta-
mylglutaminylhistidylasparaginylisoleucylglutamylpronylglu-0
tamyllysylmethionylluecylalanylalanyoeucyllysylvalylpheny-
lalanylvalylglutamilylprolylmethionyllysylalanylalanylthreo-
nylarginylserine.
This word is a Tryptophan synthetase A protein, an enzyme that has 267 amino acids, and makes a record of 1,909 letters. It is the term for the formula C1289H2051N343O375S8. It has actually been printed in various publications. I guess those reporters weren't paid by the word.