pneumonoultramicroscopicsilicovolcanoconiosis

Etymology
Coined by Everett K Smith, President of the, at their convention in 1935 as a deliberately long word. From +  + 🇨🇬 +  +  +, as an extension of the medical term pneumonoconiosis.

Noun

 * 1)  A disease of the lungs, allegedly caused by inhaling microscopic silicate particles originating from the eruption of a volcano.

Usage notes

 * This word was invented purely to be a contender for the title of the longest word in the English language, comprising forty-five letters and nineteen syllables. The word is not in official medical usage, and textbooks refer to this disease as pneumonoconiosis, pneumoconiosis, or silicosis.
 * Cited as the longest word in the , the dictionary lists it as “a factitious word alleged to mean ‘a lung disease caused by inhalation of very fine silica dust usually found in volcanos’ but occurring chiefly as an instance of a very long word”.

Translations

 * American Sign Language:
 * Chinese:
 * Mandarin: 礦工氣管癌
 * Czech: pneumonoultramikroskoppicsilicovolcanokonióza
 * Finnish: pneumonoultramikroskopikosilikovulkanokonioosi
 * French: pneumonoultramicroscopiquesilicovolcanoconiose
 * German: Quarzstaublunge, Quarzstaublungenkrankheit, Silikose
 * Japanese: ニューモノウルトラマイクロスコーピックシリコヴォルケーノコニオシス,
 * Korean: 진폐증
 * Portuguese:
 * Spanish: