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| 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. |
| (used as a nonsense word by children to express approval or to represent the longest word in English.) |
autoantigen au·to·an·ti·gen (ô'tō-ān'tĭ-jən)
n.
A tissue constituent that evokes an immune response to the host's tissues.