珪けい性せい肺はい塵じん症しょう

noun

pneumonoultramicroscopicsilicovolcanoconiosis

A facetious medical term for a lung disease caused by inhaling very fine silica dust, often cited as one of the longest words in English. In Japanese, it is a direct translation of the English coined word and is rarely used outside of word-length trivia.

• 「珪けい性せい肺はい塵じん症しょう」は、英えい語ごの非ひ常じょうに長ながい医い学がく用よう語ごの訳やく語ごとして知しられている。

  "珪性肺塵症" is known as a translation of a very long English medical term.