Etymology
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pneumonoultramicroscopicsilicovolcanoconiosis (n.)

1962, "A facetious word alleged to mean 'a lung disease caused by the inhalation of very fine silica dust' but occurring chiefly as an instance of a very long word" [OED]. Said in an early reference to have been invented by seventh grade students in Norfolk, Virginia.

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Dictionary entries near pneumonoultramicroscopicsilicovolcanoconiosis

pneumato-

pneumo-

pneumonia

pneumonic

pneumono-

pneumonoultramicroscopicsilicovolcanoconiosis

pneumothorax

pnyx

Po

*po(i)-

poach