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3 Longest Words In The English Dictionary

Longest Words

What makes a word a word? For something to be considered a word Merriam-Webster requires that it must:

  1. Have widespread usage
  2. Have sustained usage
  3. Have meaningful usage
Here are the 3 longest words in the English dictionary according to Merriam-Webster

1. Electroencephalographically (27 letter) - "Using an Electroencephalograph, an apparatus for detecting and recording brain waves, to examine a patient."

For Dr. Phillips' study, he's examining CTE patients Electroencephalographically."

2. Pseudo-Pseudohypoparathyroidism (30 letters) - " A relatively mild form of Pseudo-Pseudohypoparathyroidism that is characterized by normal levels of calcium and phosphorus in the blood."

"After looking at your genetic testing we think you have PPHP, otherwise known as Pseudo-Pseudohypoparathyroidism."

3. Pneumonoultramicroscopicsilicovolcanoconiosis (45 letters) - "A disease of the lungs caused by the habitual inhalation of very fine silica or quartz dust and occurring especially miners"

"The miners have severe Pneumonoultramicroscopicsilicovolcanoconiosis from not using protective masks"

It was thought to be invented by the president of the national puzzlers league on February 23, 1935. Of course there are other, unofficial words out there that are even longer such as 

85 letter word New Zealand

Taumatawhakatangi­hangakoauauotamatea­turipukakapikimaunga­horonukupokaiwhen­uakitanatahu (85 letters) - The place name for a hill in New Zealand.

1,89,819 letters word - Or the chemical name for titin - a giant protein found in humans which takes over 3 hours to pronounce.