The identity of the longest word in English depends upon the definition of what constitutes a word in the English language, as well as how length should be compared. In addition to words derived naturally from the language's roots (without any known intentional invention), English allows new words to be formed by coinage and construction; place names may be considered words; technical terms may be arbitrarily long. Length may be understood in terms of orthography and number of written letters, or (less commonly) phonology and the number of phonemes.
| Word | Letters | Characteristics | Dispute |
|---|---|---|---|
| Methionylthreonylthreonylglutaminylarginyl...isoleucine | 189,819 | Chemical name of titin, the largest known protein | Technical; not in dictionary; disputed whether it is a word |
| Methionylglutaminylarginyltyrosylglutamyl...serine | 1,909 | Longest published word | Technical |
| Lopadotemachoselachogaleokranioleipsano...pterygon | 183 | Longest word coined by a major author, the longest word ever to appear in literature. | Coined; not in dictionary; Ancient Greek transliteration |
| Pneumonoultramicroscopicsilicovolcanoconiosis | 45 | Longest word in a major dictionary | Technical; coined to be the longest word |
| Supercalifragilisticexpialidocious | 34 | Famous for being created for the Mary Poppins film and musical | Coined |
| Pseudopseudohypoparathyroidism | 30 | Longest non-coined word in a major dictionary | Technical |
| Floccinaucinihilipilification | 29 | Longest unchallenged nontechnical word | Coined |
| Antidisestablishmentarianism | 28 | Longest non-coined and nontechnical word | |
| Honorificabilitudinitatibus | 27 | Longest word in Shakespeare's works; longest word in the English language featuring alternating consonants and vowels. | Latin |
Read more about Longest Word In English: Major Dictionaries, Coinages, Constructions, Technical Terms, Place Names, Words With Certain Characteristics of Notable Length, Humour
Famous quotes containing the words longest, word and/or english:
“The longest day must have its close—the gloomiest night will wear on to a morning. An eternal, inexorable lapse of moments is ever hurrying the day of the evil to an eternal night, and the night of the just to an eternal day.”
—Harriet Beecher Stowe (1811–1896)
“For in the word death
There is nothing to grasp; nothing to catch or claim;
Nothing to adapt the skill of the heart to, skill
In surviving, for death it cannot survive,
Only resign the irrecoverable keys.
The wave falters and drowns. The coulter of joy
Breaks. The harrow of death
Depends. And there are thrown up waves.”
—Philip Larkin (1922–1986)
“He that would the daughter win
Must with the mother first begin.”
—17th-century English proverb, collected in J. Ray, English Proverbs (1670)