pneumonoultramicroscopicsilicovolcanoconiosis /ˈnumənoʊˌʌltrəˌmaɪkrəˌskɒpɪkˈsɪlɪˌ koʊvɒlˌkeɪnoʊˌkoʊniˈoʊsɪs/
meaning:
–noun
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.