Largest word in the World

Largest word in the world are of different categories like Technical word,Chemical word,Ancient Greek word,Latin word,etc...
This Largest word in the world are contributed in English Language as few example follows as:

• Non technical coined Largest word in the world according to dictionary.It is 29 letters word "floccinaucinihilipilification".

• Another Non technical  but no coined largest word in the world with 28 letters word is "Antidisestablishmentarianism". 
• Technical non coined Largest word in the world according to major dictionary.It is 30 Letters word "Pseudopseudohypoparathyroidism".
• The 45 letters word was coined to serve as the Largest word in the world according to the oxford dictionary "Pneumonoultramicroscopicsilicovolcanoconiosis" a lung disease caused by inhalation of very fine of very fine silica dust causing inflammation in the lungs.This word was coined in 1935 by Everett M. Smith, president of the National Puzzlers League, at its annual meeting. The word appeared in the title of an article published by the New York Herald Tribune, February 23, 1935, titled "Puzzlers Open 103d Session Here recognizing 45-Letter Word "Pneumonoultramicroscopicsilicovolcanoconiosis" electrophotomicrographically successful as the longest word in the English language recognized by the National Puzzlers League at the opening of the 103rd semi-annual meeting of the organization held yesterday at the Hotel New Yorker session. The puzzles have explained that the word forty-five letter is the name of a particular form of silicosis caused by ultra-microscopic particles of silica volcanic dust ...Subsequently, the word was used in a puzzle book, Manna night, after which members of the NPL campaign for inclusion in the main dictionary.
  
• "Supercalifragilisticexpialidocious" is the largest word in the world from Disney musical film mary poppins. Actualy it is a song from the film. According to Richard M. Sherman, co-author of the song with his brother, Robert, the word was created by them in two weeks, especially on a double discourse. The roots of the word have been defined as follows: super-"above", cali-"beauty", fragilistic-"delicate", expiali-"atone" and docious-"educable", with the sum of these parts signifying about "atoning for educability through delicate beauty". According to the film, it is defined as "something to say when you have nothing to say.

Other than this largest words  we have many more in largest words in the world which are invented by the scientist called as technical words,some are general words prefix/suffix to serve for few purposes.These are considered by the length of the word.