Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  deltoid, deltoid muscle, musculus deltoideus(adj) a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm. 2  deltoid(adj) triangular or suggesting a capital delta, with a point at the apex.
Founded in 1846, Washington, D.C.'s Smithsonian Institution is the world's largest museum and research center, with 19 museums and galleries, nine research facilities, and the National Zoological Park. Most of these attractions are located in and around the National Mall, between the Lincoln Memorial and the U.S. Capitol.
Ronald Reagan Washington National Airport (DCA). DCA is located in Arlington, VA just across the Potomac River from the Nationâs Capital, four miles south of D.C., a trip of only a few minutes by car, 15 to 20 minutes by Metro in non-rush-hour traffic.NTA events will be in the Walter E. Washington Convention Center (WCC) which is located between 7th and 9th Streets and N Street and Mt. Vernon Place in downtown DC, right across from the City Museum. Walter E. Washington Convention Center (WCC). 801 Mount Vernon Place, NW.