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radium
(Encyclopedia) radiumradiumrāˈdēəm [key] [Lat. radius=ray], radioactive metallic chemical element; symbol Ra; at. no. 88; mass number of most stable isotope 226; m.p. 700℃; b.p. 1,140℃; sp. gr. about…radium emanation
(Encyclopedia) radium emanation: see radon.radius
(Encyclopedia) radius, in anatomy: see arm.Ballarat
(Encyclopedia) Ballarat Ballarat bălˈərătˈ [key], city, Victoria, SE Australia. It is an industrial center; clothing…Radnorshire
(Encyclopedia) Radnorshire, former county, E Wales. In 1974, Radnorshire became part of the nonmetropolitan county of Powys.Radom
(Encyclopedia) RadomRadomräˈdôm [key], city (1993 est. pop. 230,500), Mazowieckie prov., SE Poland. It is a railway junction and an industrial center. The main products are textiles, glassware,…radon
(Encyclopedia) radonradonrāˈdŏn [key], gaseous radioactive chemical element; symbol Rn; at. no. 86; mass no. of most stable isotope 222; m.p. about −71℃; b.p. −61.8℃; density 9.73 grams per liter at…Rae, John
(Encyclopedia) Rae, John, 1813–93, Scottish arctic explorer, b. Orkney Islands. A physician in the employ of the Hudson's Bay Company in N Canada, Rae made (1846–47) a journey of exploration from…Raeburn, Sir Henry
(Encyclopedia) Raeburn, Sir HenryRaeburn, Sir Henryrāˈbərn [key], 1756–1823, Scottish portrait painter, b. near Edinburgh. He was apprenticed to a goldsmith at 15 and he showed considerable talent.…Raeder, Erich
(Encyclopedia) Raeder, ErichRaeder, Erichāˈrĭkh rāˈdər [key], 1876–1960, German admiral. As chief of staff to Admiral Franz von Hipper in World War I, he took part in the battles of Dogger Bank (1915…Trending
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