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Rebecca O'Connell

What's the Longest Word in the World? Here are 12 of Them, By Category

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Rebecca O'Connell

Antidisestablishmentarianism, everyone’s favorite agglutinative, entered the pop culture lexicon on August 17, 1955, when Gloria Lockerman, a 12-year-old girl from Baltimore, correctly spelled it on The $64,000 Question as millions of people watched from their living rooms. At 28 letters, the word—which is defined as a 19th-century British political movement that opposes proposals for the disestablishment of the Church of England—is still regarded as the longest non-medical, non-coined, nontechnical word in the English language, yet it keeps some robust company. Here are some examples of the longest words by category.

1. METHIONYLTHREONYLTHREONYGLUTAMINYLARGINYL … ISOLEUCINE 

Note the ellipses. All told, the full chemical name for the human protein titin is 189,819 letters, and takes about three-and-a-half hours to pronounce. The problem with including chemical names is that there’s essentially no limit to how long they can be. For example, naming a single strand of DNA, with its millions and millions of repeating base pairs, could eventually tab out at well over 1 billion letters.

2. LOPADOTEMACHOSELACHOGALEOKRANIOLEIPSAN …P TERYGON

The longest word ever to appear in literature comes from Aristophanes’ play, Assemblywomen, published in 391 BC. The Greek word tallies 171 letters, but translates to 183 in English. This mouthful refers to a fictional fricassee comprised of rotted dogfish head, wrasse, wood pigeon, and the roasted head of a dabchick, among other culinary morsels. 

3. PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS

At 45 letters, this is the longest word you’ll find in a major dictionary. An inflated version of silicosis, this is the full scientific name for a disease that causes inflammation in the lungs owing to the inhalation of very fine silica dust. Despite its inclusion in the dictionary, it’s generally considered superfluous, having been coined simply to claim the title of the longest English word.

4. PARASTRATIOSPHECOMYIA STRATIOSPHECOMYIOIDES 

The longest accepted binomial construction, at 42 letters, is a species of soldier fly native to Thailand. With a lifespan of five to eight days, it’s unlikely one has ever survived long enough to hear it pronounced correctly.

5. PSEUDOPSEUDOHYPOPARATHYROIDISM

This 30-letter thyroid disorder is the longest non-coined word to appear in a major dictionary.

6. FLOCCINAUCINIHILIPILIFICATION

By virtue of having one more letter than antidisestablishmentarianism, this is the longest non-technical English word. A mash-up of five Latin roots, it refers to the act of describing something as having little or no value. While it made the cut in the Oxford English Dictionary, Merriam-Webster volumes refuse to recognize it, chalking up its existence to little more than linguistic ephemera.

7. SUBDERMATOGLYPHIC

At 17 characters, this is the longest accepted isogram, a word in which every letter is used only once, and refers to the underlying dermal matrix that determines the pattern formed by the whorls, arches, and ridges of our fingerprints. 

8. SQUIRRELLED

Though the more commonly accepted American English version carries only one L, both Oxford and Merriam-Webster dictionaries recognize this alternate spelling and condone its one syllable pronunciation (think “world”), making it the longest non-coined monosyllabic English word at 11 letters.

9. ABSTENTIOUS

One who doesn’t indulge in excesses, especially food and drink; at 11 letters this is the longest word to use all five vowels in order exactly once.

10. ROTAVATOR 

A type of soil tiller, the longest non-coined palindromic word included in an English dictionary tallies nine letters. Detartrated, 11 letters, appears in some chemical glossaries, but is generally considered too arcane to qualify.

11. and 12. CWTCH, EUOUAE

The longest words to appear in a major dictionary comprised entirely of either vowels or consonants. A Cwtch, or crwth, is from the Welsh word for a hiding place. Euouae, a medieval musical term, is technically a mnemonic, but has been accepted as a word in itself. 

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'Froyo,' 'Troll,' and 'Sriracha' Added to the Merriam-Webster Dictionary
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Looking for the right word to describe the time you spend drinking before heading out to a party, or a faster way to say “frozen yogurt?" Merriam-Webster is here to help. The 189-year-old English vocabulary giant has just added 250 new words and definitions to their online dictionary, including pregame and froyo.

New words come and go quickly, and it’s Merriam-Webster’s job to keep tabs on the terms that have staying power. “As always, the expansion of the dictionary mirrors the expansion of the language, and reaches into all the various cubbies and corners of the lexicon,” they wrote in their announcement.

Froyo is just one of the recent additions to come from the culinary world. Bibimbap, a Korean rice dish; choux pastry, a type of dough; and sriracha, a Thai chili sauce that’s been around for decades but has just recently exploded in the U.S., are now all listed on Merriam-Webster's website.

Of course, the internet was once again a major contributor to this most recent batch of words. Some new terms, like ransomware (“malware that requires the victim to pay a ransom to access encrypted files”) come from the tech world, while words like troll ("to harass, criticize, or antagonize [someone] especially by provocatively disparaging or mocking public statements, postings, or acts”) were born on social media. Then there’s the Internet of Things, a concept that shifts the web off our phones and computers and into our appliances.

Hive mind, dog whistle, and working memory are just a few of the new entries to receive the Merriam-Webster stamp of approval. To learn more about how some words make it into the dictionary while others get left out, check these behind-the-scenes secrets of dictionary editors.

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How New Words Become Mainstream
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If you used the words jeggings, muggle, or binge-watch in a sentence 30 years ago, you would have likely been met with stares of confusion. But today these words are common enough to hold spots in the Oxford English Dictionary. Such lingo is a sign that English, as well as any other modern language, is constantly evolving. But the path a word takes to enter the general lexicon isn’t always a straightforward one.

In the video below, TED-Ed lays out how some new words become part of our everyday speech while others fade into obscurity. Some words used by English speakers are borrowed from other languages, like mosquito (Spanish), avatar (Sanskrit), and prairie (French). Other “new” words are actually old ones that have developed different meanings over time. Nice, for example, used to only mean silly, foolish, or ignorant, and meat was used as blanket term to describe any solid food given to livestock.

The internet alone is responsible for a whole new section of our vocabulary, but even the words most exclusive to the web aren’t always original. For instance, the word meme was first used by Richard Dawkins in his 1976 book The Selfish Gene.

To learn more about the true origins of the words we use on a regular basis, check out the full story from TED-Ed below.

[h/t TED-Ed]

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