coni-, conio-, -coniosis, -conite, koni-, konio-, kon-, kono-

(Greek: dust; as seen in many words)

otoconium (s), otoconia (pl)
One of the minute calciferous granules within the gelatinous statoconic membrane surmounting the acoustic maculae (membrana statoconiorum macularum).
pneumoconiosis
pneumokoniosis
pneumonoconiosis
pneumonokoniosis
pneumonoultramicroscopicsilicovolcanoconiosis, pneumonoultramicroscopicsilicovolcanokoniosis (s) (noun) (no pl)
A disease of the lungs caused by the inhalation of very fine silicate, or quartz dust: Pneumonoultramicroscopicsilicovolcanoconiosis occurs especially in the lungs of miners.

This is one of the longest words in the English language with 45 letters and is divided into the following segments: pneu, mono, ultra, micro, scopic, silico, volcano, coni, osis; and together they mean "miner's lung disease".