beryllium

[ buh-ril-ee-uh m ]
/ 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 beryllium

1860–65; < Latin bēryll(us) beryl + -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for beryllium

British Dictionary definitions for beryllium

beryllium

/ (bɛˈrɪlɪəm) /

noun

a 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 beryllium

C19: 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

Word Origin and History for beryllium

beryllium


n.

metallic element, 1863, so called because it figures in the composition of the pale green precious stone beryl and was identified in emerald (green beryl) in 1797 by French chemist Louis Nicolas Vauquelin (1763-1829) and first isolated in 1828. At first and through 19c. also sometimes called glucinum or glucinium.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for beryllium

beryllium

[ bə-rĭlē-əm ]

n. Symbol Be

A 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.

Science definitions for beryllium

beryllium

[ bə-rĭlē-əm ]

Be

A 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.