americium

[ am-uh-rish-ee-uhm ]

/ ˌæm əˈrɪʃ i əm /

noun Chemistry.

a transuranic element, one of the products of high-energy helium bombardment of uranium and plutonium. Symbol: Am; atomic number: 95.

Origin of americium

An Americanism dating back to 1945–50; Americ(a) + -ium

Words nearby americium

American water spaniel, American wirehair, American woodbine, America's Cup, “America the Beautiful”, americium, Americus, Amerigo Vespucci, Amerind, Amerindian, ameristic

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

British Dictionary definitions for americium

americium

/ (ˌæməˈrɪsɪəm) /

noun

a white metallic transuranic element artificially produced from plutonium. It is used as an alpha-particle source. Symbol: Am; atomic no: 95; half-life of most stable isotope, 243 Am: 7.4 × 10³ years; valency: 2,3,4,5, or 6; relative density: 13.67; melting pt: 1176°C; boiling pt: 2607°C (est)

Word Origin for americium

C20: from America (because it was discovered at Berkeley, California) + -ium

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

Medical definitions for americium

americium

[ ăm′ə-rĭsh′ē-əm ]

n. Symbol Am

A white metallic synthetic element of the actinide series whose longest-lived isotopes, Am 241 and Am 243, are used as radiation sources for bone mineral analysis and in treating cancer. Atomic number 95.

Scientific definitions for americium

americium

[ ăm′ə-rĭsh′ē-əm ]

Symbol Am A synthetic, silvery-white, radioactive metallic element of the actinide series that is produced artificially by bombarding plutonium with neutrons. Americium is used as a source of alpha particles for smoke detectors and gamma rays for industrial gauges. Its most stable isotope has a half-life of 7,950 years. Atomic number 95; specific gravity 11.7; valence 3, 4, 5, 6. See Periodic Table.

单词	americium
释义	americium [ am-uh-rish-ee-uhm ] / ˌæm əˈrɪʃ i əm / noun Chemistry. a transuranic element, one of the products of high-energy helium bombardment of uranium and plutonium. Symbol: Am; atomic number: 95. Origin of americium An Americanism dating back to 1945–50; Americ(a) + -ium Words nearby americium American water spaniel, American wirehair, American woodbine, America's Cup, “America the Beautiful”, americium, Americus, Amerigo Vespucci, Amerind, Amerindian, ameristic Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for americium americium / (ˌæməˈrɪsɪəm) / noun a white metallic transuranic element artificially produced from plutonium. It is used as an alpha-particle source. Symbol: Am; atomic no: 95; half-life of most stable isotope, 243 Am: 7.4 × 10³ years; valency: 2,3,4,5, or 6; relative density: 13.67; melting pt: 1176°C; boiling pt: 2607°C (est) Word Origin for americium C20: from America (because it was discovered at Berkeley, California) + -ium 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 Medical definitions for americium americium [ ăm′ə-rĭsh′ē-əm ] n. Symbol Am A white metallic synthetic element of the actinide series whose longest-lived isotopes, Am 241 and Am 243, are used as radiation sources for bone mineral analysis and in treating cancer. Atomic number 95. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for americium americium [ ăm′ə-rĭsh′ē-əm ] Symbol Am A synthetic, silvery-white, radioactive metallic element of the actinide series that is produced artificially by bombarding plutonium with neutrons. Americium is used as a source of alpha particles for smoke detectors and gamma rays for industrial gauges. Its most stable isotope has a half-life of 7,950 years. Atomic number 95; specific gravity 11.7; valence 3, 4, 5, 6. See Periodic Table. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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