A surname originating as an occupation or as a patronymic for a son of a smith.

plural of Smithson

(mineralogy) A mineral form of zinc carbonate, ZnCO₃, mined as an ore of zinc or as an ornamental stone.

plural of smithsonite

The Smithsonian Institution, a group of museums and research centers established in 1846 and administered by the United States government.

Of or pertaining to James Smithson (c.1765–1829), British mineralogist and chemist whose bequest was used to set up the Smithsonian Institution in the United States.