a rare-earth metallic element discovered in samarskite. Symbol: Sm; atomic weight: 150.35; atomic number: 62; specific gravity: 7.49.
a silvery metallic element of the lanthanide series occurring chiefly in monazite and bastnaesite and used in carbon-arc lighting, as a doping agent in laser crystals, and as a neutron-absorber. Symbol: Sm; atomic no: 62; atomic wt: 150.36; valency: 2 or 3; relative density: 7.520; melting pt: 1074°C; boiling pt: 1794°C
samarium sa·mar·i·um (sə-mâr’ē-əm, -mār’-)
A metallic rare-earth element used in ferromagnetic alloys, in infrared absorbing glass, and as a neutron absorber in certain nuclear reactors. Atomic number 62; atomic weight 150.36; melting point 1,072°C; boiling point 1,790°C; specific gravity 7.52; valence 2, 3.
A silvery-white metallic element of the lanthanide series that exists in several forms and has seven naturally occurring isotopes. It is used to make glass that absorbs infrared light and to absorb neutrons in the fuel rods of nuclear reactors. Atomic number 62; atomic weight 150.36; melting point 1,072°C; boiling point 1,791°C; specific gravity approximately 7.50; valence 2, 3. See Periodic Table.
noun 1. a city in SE Uzbekistan: taken by Alexander the Great 329 b.c.; Tamerlane’s capital in the 14th century. noun 1. a province of the ancient Persian Empire between the Oxus and Jaxartes rivers: now in Uzbekistan. Capital: Samarkand. noun 1. a city in E Uzbekistan: under Tamerlane it became the chief economic and […]
noun 1. a town in central Iraq, on the Tigris: seat of the early Abassid caliphs.
noun 1. a velvet-black mineral, a complex columbate-tantalate of uranium, cerium, etc., occurring in masses: a minor source of uranium, thorium, and rare-earth oxides. noun 1. a velvety black mineral of complex composition occurring in pegmatites: used as a source of uranium and certain rare earth elements
noun, Hinduism. 1. one of the Samhitas, a collection of mantras and tunes used in connection with the Rig-Veda. noun 1. (Hinduism) the third Veda containing the rituals for sacrifices