a national museum and institution in Washington, DC, founded in 1846 from a bequest by James Smithson, primarily concerned with ethnology, zoology, and astrophysics
Smithsonian Institution in American English
(smɪθˈsoʊniən)
institution & museum founded in 1846 in Washington, D.C. by a bequest of James Smithson (1765?-1829), Eng. scientist: branches of the Institution cover a wide range of fields in the arts and sciences