pneumonoultramicroscopicsilicovolcanoconiosis

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

noun
\ˈn(y)ü-mə-(ˌ)nō-ˌəl-trə-ˌmī-krə-ˈskäp-ik-ˈsil-i-(ˌ)kō-väl-ˈkā-nō-ˌkō-nē-ˈō-səs\

plural pneu·mo·no·ul·tra·mi·cro·scop·ic·sil·i·co·vol·ca·no·co·ni·o·ses \-ˌsēz\

Definition of PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS

: a pneumoconiosis caused by inhalation of very fine silicate or quartz dust