ALL meanings of radium
ra·di·um
R r - noun radium chemical element 1
- noun radium Chemistry. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; atomic weight: 226; atomic number: 88. 1
- noun radium a lustrous rayon or silk fabric constructed in plain weave and used in women's apparel, lining, and drapery. 1
- uncountable noun radium Radium is a radioactive element which is used in the treatment of cancer. 0
- noun radium a highly radioactive luminescent white element of the alkaline earth group of metals. It occurs in pitchblende, carnotite, and other uranium ores, and is used in radiotherapy and in luminous paints. Symbol: Ra; atomic no: 88; half-life of most stable isotope, 226Ra: 1620 years; valency: 2; relative density: 5; melting pt: 700°C; boiling pt: 1140°C 0
- noun radium (as modifier) 0
- noun radium a radioactive, metallic chemical element, one of the alkaline-earth metals, found in very small amounts in pitchblende and other minerals containing uranium: it undergoes spontaneous atomic disintegration through several stages, emitting alpha, beta, and gamma rays and finally forming an isotope of lead: radium is used in neutron sources and in the treatment of cancer and other diseases: symbol, Ra; at. no., 88 0