Definitions for radiumˈreɪ di əm

This page provides all possible meanings and translations of the word radium

Princeton's WordNet

  1. radium, Ra, atomic number 88(noun)

    an intensely radioactive metallic element that occurs in minute amounts in uranium ores


  1. radium(Noun)

    a radioactive metallic chemical element (symbol Ra) with an atomic number of 88.

  2. Origin: radio- (from radioactive) + -ium


  1. Radium

    Radium is a chemical element with symbol Ra and atomic number 88. Radium is an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air, becoming black in color. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1601 years and decays into radon gas. Because of such instability, radium is luminescent, glowing a faint blue. Radium, in the form of radium chloride, was discovered by Marie Skłodowska-Curie and Pierre Curie in 1898. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1910. Since its discovery, it has given names like radium A and radium C2 to several isotopes of other elements that are decay products of radium-226. In nature, radium is found in uranium ores in trace amounts as small as a seventh of a gram per ton of uraninite. Radium is not necessary for living organisms, and adverse health effects are likely when it is incorporated into biochemical processes because of its radioactivity and chemical reactivity.

U.S. National Library of Medicine

  1. Radium

    Radium. A radioactive element of the alkaline earth series of metals. It has the atomic symbol Ra, atomic number 88, and atomic weight 226. Radium is the product of the disintegration of uranium and is present in pitchblende and all ores containing uranium. It is used clinically as a source of beta and gamma-rays in radiotherapy, particularly BRACHYTHERAPY.

The Foolish Dictionary, by Gideon Wurdz


    A radiant radiator, redolent of ranging radial rays of radio-activity, raised to radical rates and regarded as a ruthless rake-off in the reign of riches within the arrayed radius of a raging, raving and raided race.

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