radium

[ rey-dee-uhm ]

/ ˈreɪ di əm /

noun

Chemistry. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; atomic weight: 226; atomic number: 88.

a lustrous rayon or silk fabric constructed in plain weave and used in women's apparel, lining, and drapery.

Origin of radium

1895–1900; <New Latin, equivalent to Latin rad(ius) ray (see radius) + -ium-ium

Words nearby radium

radio waves, radio window, radisectomy, radish, Radisson, radium, radium A, radium B, radium emanation, radium F, radium sulfate

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for radium

During his spare time Johnny had delved into these and had been fascinated by the story of radium.
Riddle of the Storm|Roy J. Snell
The name for this element, radium, was proposed by Madame Curie, who had also suggested the term "radio-activity."
A History of Science, Volume 5(of 5)|Henry Smith Williams
When excision is impracticable, benefit may be derived from the use of radium or of the X-rays.
Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition.|Alexander Miles
It has been proved that all the β- and γ-rays emitted by radium salts are really due to certain of these secondary products.
Alchemy: Ancient and Modern|H. Stanley Redgrove

Recourse should be had to the use of radium both before and after operation, otherwise recurrence is all but inevitable.
Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition.|Alexander Miles

British Dictionary definitions for radium

radium

/ (ˈreɪdɪəm) /

noun

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, 226 Ra: 1620 years; valency: 2; relative density: 5; melting pt: 700°C; boiling pt: 1140°C
(as modifier)radium needle

Word Origin for radium

C20: from Latin radius ray

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for radium

radium

A naturally occurring radioactive chemical element. Its symbol is Ra.

notes for radium

Radium was discovered by the chemists Marie and Pierre Curie.

Medical definitions for radium

radium

[ rā′dē-əm ]

n. Symbol Ra

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.

Scientific definitions for radium

radium

[ rā′dē-əm ]

Ra

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.

单词	radium
释义	radium [ rey-dee-uhm ] / ˈreɪ di əm / noun Chemistry. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; atomic weight: 226; atomic number: 88. a lustrous rayon or silk fabric constructed in plain weave and used in women's apparel, lining, and drapery. Origin of radium 1895–1900; <New Latin, equivalent to Latin rad(ius) ray (see radius) + -ium-ium Words nearby radium radio waves, radio window, radisectomy, radish, Radisson, radium, radium A, radium B, radium emanation, radium F, radium sulfate Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for radium During his spare time Johnny had delved into these and had been fascinated by the story of radium. Riddle of the Storm\|Roy J. Snell The name for this element, radium, was proposed by Madame Curie, who had also suggested the term "radio-activity." A History of Science, Volume 5(of 5)\|Henry Smith Williams When excision is impracticable, benefit may be derived from the use of radium or of the X-rays. Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition.\|Alexander Miles It has been proved that all the β- and γ-rays emitted by radium salts are really due to certain of these secondary products. Alchemy: Ancient and Modern\|H. Stanley Redgrove Recourse should be had to the use of radium both before and after operation, otherwise recurrence is all but inevitable. Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition.\|Alexander Miles British Dictionary definitions for radium radium / (ˈreɪdɪəm) / noun 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, 226 Ra: 1620 years; valency: 2; relative density: 5; melting pt: 700°C; boiling pt: 1140°C (as modifier)radium needle Word Origin for radium C20: from Latin radius ray Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for radium radium A naturally occurring radioactive chemical element. Its symbol is Ra. notes for radium Radium was discovered by the chemists Marie and Pierre Curie. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for radium radium [ rā′dē-əm ] n. Symbol Ra 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. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for radium radium [ rā′dē-əm ] Ra 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. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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