Either the X-ray or radium had caused her dermatitis and nervousness.
They must be protected from the direct rays of the radium, which is refined.
At present, however, the scarcity and cost and danger of radium will keep it in the hands of the experimenter.
This, Professor Gurlone told him, was the effect of the radium rays.
Physicists did not take long to discover that the radiation from radium was very like the radiation in a "Crookes tube."
If brains were radium, you couldn't make a flicker on a scintillation counter.
We must be nearly at Snake Island, if there is any such place, and if were going to get that radium fortune its time we got busy.
What the discovery of radium implied was only gradually realised.
Excision, unless performed early, is of little avail, and in any case should be followed up by exposure to radium.
radium paint, I suppose, and no man has ever found how to stop the glow of radium.
radioactive metallic element, 1899, from French radium, named 1898 after identification by Marie Curie and her husband, formed in Modern Latin from Latin radius "ray" (see radius). So called for its power of emitting energy in the form of rays.
radium ra·di·um (rā'dē-əm)
A luminescent, highly radioactive metallic element found in minute amounts in uranium ores, used as a neutron source for some research purposes, and formerly used in cancer radiotherapy; its most stable isotope is Ra 226 with a half-life of 1,622 years. Atomic number 88; melting point 700°C; boiling point 1,140°C; valence 2.
A rare, bright-white, highly radioactive element of the alkaline-earth group. It occurs naturally in very small amounts in ores and minerals containing uranium, and it is naturally luminescent. Radium is used as a source of radon gas for the treatment of disease and as a neutron source for scientific research. Its most stable isotope is Ra 226 with a half-life of 1,622 years. Atomic number 88; melting point 700°C; boiling point 1,737°C; valence 2. See Periodic Table.