D defs.my
Entry 1 sense Webster, 1913

Smithsonian

/(-sō"nĭ*an)/ · Smith·so·ni·an · IPA /smɪθˈsəʊni.ən/
01 a. Of or pertaining to the Englishman J. L. M. Smithson, or to the national institution of learning which he endowed at Washington, D. C.; as,…
  1. 1.
    Of or pertaining to the Englishman J. L. M. Smithson, or to the national institution of learning which he endowed at Washington, D. C.; as, the Smithsonian Institution; Smithsonian Reports.