pneumonoultramicroscopicsilicovolcanoconiosis: Meaning and Definition of

pneu•mo•no•ul•tra•mi•cro•scop•ic•sil•i•co•vol•ca•no•co•ni•o•sis

Pronunciation: (n'mu-nō-ul"tru-mī"kru-skop"ik-sil'i-kō"vol-kā"nō-kō"nē-ō'sis, ny'-), [key]
— n.
  1. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
pneumonoconiosis pneumothorax
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