A lung disease caused by inhaling volcanic ash and/or dust. Can also be caused by inhaling very fine silica dust particles. Also, it is the longest English word to ever appear in a dictionary. It was first coined in 1931. The longest English word ever is the chemical name of titin ,the largest protein in the human body.
You won't have to use this word much, but if you have ever been near a volcano, and you start coughing like crazy, then you probably have pneumonoultramicroscopicsilicovolcanoconiosis.
by mkakapo January 29, 2014
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It’s pronounced nju mə(ʊ)nəʊˌʌltrəˌmʌɪkrə(ʊ)ˈskɒpɪkˌsɪlɪkəʊvɒlˌkeɪnəʊˌkəʊnɪˈəʊsɪs not that that is any great help but, at 45 letters, it is at the time of writing, the longest word to be found in an English dictionary. As for what it is, it’s a lung disease caused by inhaling dust and ash from volcanoes, so it’s a variant of silicosis and pneumoconiosis. It is said to be a made-up word intended simply to be the longest word in the English language, but it isn’t, that title goes to the chemical name for Titin which is a type of protein. In English this word has 189,819 letters and would take three-and-a-half hours to pronounce.
If you thought Pneumonoultramicroscopicsilicovolcanoconiosis was bad, let’s see you pronounce the chemical name of titin.
by AKACroatalin April 08, 2019
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The longest word in the English language that has a, definition.

A type of a silicosis disease.

Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust, and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.
by RandomoDudo June 11, 2021
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