超微粒硅酸盐尘埃沉着症（英语： Pneumonoultramicroscopicsilicovolcanoconiosis，或称-koniosis，简称火山肺硅病、火山硅肺病），总共由45个英文本母组合而成。

但是这种病学术上有个更通用的名字叫做Pneumoconiosis（肺尘病）。

Pneumonoultramicroscopicsilicovolcanoconiosis (/ˌnjuːmənoʊˌʌltrəˌmaɪkrəˈskɒpɪkˌsɪlɪkoʊvɒlˌkeɪnoʊˌkoʊniˈoʊsᵻs, ˌnjuːmoʊ-, -maɪkroʊ-/) is an English word that refers to a lung disease that is otherwise known as silicosis. It is the longest word in the English language published in a dictionary, the Oxford English Dictionary.