单词 | beryllium |
释义 | beryllium[ buh-ril-ee-uhm ] / bəˈrɪl i əm / noun Chemistry.a steel-gray, bivalent, hard, light, metallic element, the salts of which are sweet: used chiefly in copper alloys for better fatigue endurance, in springs, and in electrical contacts. Symbol: Be; atomic weight: 9.0122; atomic number: 4; specific gravity: 1.8 at 20° C. Origin of beryllium1860–65; <Latin bēryll(us) beryl + -ium Words nearby berylliumBerwyn, beryl, beryl blue, beryl green, berylliosis, beryllium, beryllium copper, beryllonite, Berzelius, bes, besague Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for berylliumBritish Dictionary definitions for berylliumberyllium / (bɛˈrɪlɪəm) / nouna corrosion-resistant toxic silvery-white metallic element that occurs chiefly in beryl and is used mainly in X-ray windows and in the manufacture of alloys. Symbol: Be; atomic no: 4; atomic wt: 9.012; valency: 2; relative density: 1.848; melting pt: 1289°C; boiling pt: 2472°CFormer names: glucinum, glucinium Word Origin for berylliumC19: from Latin bēryllus, from Greek bērullos 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 berylliumberyllium [ bə-rĭl′ē-əm ] n. Symbol BeA lightweight, corrosion-resistant, toxic and possibly carcinogenic metallic element used in making precision instruments. Atomic number 4. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for berylliumberyllium [ bə-rĭl′ē-əm ] BeA hard, lightweight, steel-gray metallic element of the alkaline-earth group, found in various minerals, especially beryl. It has a high melting point and is corrosion-resistant. Beryllium is used to make sturdy, lightweight alloys and aerospace structural materials. It is also used as a neutron moderator in nuclear reactors. Atomic number 4; atomic weight 9.0122; melting point 1,278°C; boiling point 2,970°C; specific gravity 1.848; 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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