The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis (45 letters), a word that refers to a lung …

Sep 2, 2025 · The longest word entered in most standard English dictionaries is Pneumonoultramicroscopicsilicovolcanoconiosis with 45 letters. Our definition is "a lung …

May 11, 2025 · Take your vocabulary to the next level with this list, featuring 13 of the longest words in the English language.

Pneumonoultramicroscopicsilicovolcanoconiosis is the longest word entered in the most trusted English dictionaries. The definition is "a lung disease caused by inhalation of very fine silicate …

Mar 24, 2025 · Number of Letters: 189,819. Definition: Yep, there’s a word out there that’s almost 190,000 letters long. Technically speaking, it’s not truly a word—it’s actually the chemical …

May 29, 2025 · The longest word in the Oxford English Dictionary is 45 letters: pneumonoultramicroscopicsilicovolcanoconiosis. According to the OED, this synonym for …

Aug 19, 2025 · Prepare to challenge your memory and discover the jaw-dropping lengths of the longest words in English.

Apr 11, 2023 · At over 180,000 letters long, the chemical name of the protein titin is often said to technically be the longest English word. If spoken out loud, this word takes over three hours to …

This is the ultimate list of the 150 longest long words in the English language.

Oct 29, 2025 · It's important to understand that while pneumonoultramicroscopicsilicovolcanoconiosis is the longest word in many dictionaries, the …