99: Pneumonoultramicroscopicsilicovolcanoconiosis
Adjective.
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.
-Dictionary.com
“Eugene’s vacation to an active volcano garnered him some breath-taking photos as well as a medical diagnosis of the lung condition pneumonoultramicroscopicsilicovolcanoconiosis.”