I've put up some long words on my blog before, but this post is much better and tells you the definition to the word too!!!
The longest English word is acually too long too put up, but you can view it at my new blog (beware it has 189,819 letters!):
This next word is also one of the longest english words:
acetylseryltyrosylserylisoleucylthreonylserylprolylserylglutaminyl-
phenylalanylvalylphenylalanylleucylserylserylvalyltryptophylalanyl-
aspartylprolylisoleucylglutamylleucylleucylasparaginylvalylcysteinyl-
threonylserylserylleucylglycylasparaginylglutaminylphenylalanyl-
glutaminylthreonylglutaminylglutaminylalanylarginylthreonylthreonyl-
glutaminylvalylglutaminylglutaminylphenylalanylserylglutaminylvalyl-
tryptophyllysylprolylphenylalanylprolylglutaminylserylthreonylvalyl-
arginylphenylalanylprolylglycylaspartylvalyltyrosyllysylvalyltyrosyl-
arginyltyrosylasparaginylalanylvalylleucylaspartylprolylleucylisoleucyl-
threonylalanylleucylleucylglycylthreonylphenylalanylaspartylthreonyl-
arginylasparaginylarginylisoleucylisoleucylglutamylvalylglutamyl-
asparaginylglutaminylglutaminylserylprolylthreonylthreonylalanylglutamyl-
threonylleucylaspartylalanylthreonylarginylarginylvalylaspartylaspartyl-
alanylthreonylvalylalanylisoleucylarginylserylalanylasparaginylisoleucyl-
asparaginylleucylvalylasparaginylglutamylleucylvalylarginylglycyl-
threonylglycylleucyltyrosylasparaginylglutaminylasparaginylthreonyl-
phenylalanylglutamylserylmethionylserylglycylleucylvalyltryptophyl-
threonylserylalanylprolylalanylserine:
Yes, it is loooooonnnnnnngggggg. About as long as a paragraph, possibly.
This 1185-letter word is the third name for "Coat protein, Tobacco Mosaic Virus,
Dahlamense Strain". It uses the letter combination yl 166 times!
Here are some other long words:
Lopadotemachoselachogaleokranioleipsanodrimhypotrimmatosilphio -
paraomelitokatakechymenokichlepikossyphophattoperisteralektryon -
optekephalliokinklopeleiolagoiosiraiobaphetraganopterygon:
This word is 183 letters long. It is a fiction name for a greek dish.
The original Greek spelling had 171 letters.
The dish was a fricassee, with 17 sweet and sour ingredients,
including brains, honey, vinegar, fish, pickles, and the following:
*Fish slices
*Fish of the Elasmobranchii subclass (a shark or ray)
*Rotted dogfish or small shark's head
generally sharp-tasting dish of several ingredients grated and pounded
together
*Silphion "laserwort," apparently a kind of giant fennel
*A kind of crab, beetle, or crayfish
*Eagle
*Cheese
*Honey poured down
*Wrasse (or thrush)
*On top of a kind of sea fish or Blackbird
*Wood pigeon
*Domestic pigeon
*Chicken
*Roasted head of dabchick
*Hare, which could be a kind of bird or a kind of sea-hare
*New wine boiled down
*Dessert fruit or thing eaten raw
*Wing, fin
Pneumonoultramicroscopicsilicovolcanoconiosis:
A 45 letter word alleged to mean 'a lung disease caused by the inhalation of very fine silica dust found in volcanoes.'
Pseudopseudohypoparathyroidism:
This 30 letter word is and inherited disorder that closely simulates the symptoms, but not the consequences of pseudohypoparathyroidism (a completely different word).
Floccinaucinihilipilification:
this 29 letter word means "the act or habit of estimating or describing something as worthless, or making something to be worthless by deprecation".