a hard, silver-white, metallic chemical element, one of the alkaline-earth metals, found only in combination with others: it forms strong, hard, lightweight alloys with several metals: symbol, Be; at. no. 4
Origin of beryllium; from beryllia, beryllium oxide (; from Classical Latin beryllus, beryl + -ia) + -ium: discovered (1798) by L. N. Vauquelin (1763-1829), French chemist
A high-melting, lightweight, corrosion-resistant, rigid, steel-gray metallic element used as an aerospace structural material, as a moderator and reflector in nuclear reactors, and in a copper alloy used for springs, electrical contacts, and nonsparking tools. Atomic number 4; atomic weight 9.0122; melting point 1,287°C; boiling point 2,470°C; specific gravity 1.848; valence 2. See Periodic Table.
Origin of berylliumFrom beryl.
- The chemical element with an atomic number of 4; a light metal with specialist industrial applications.
From New Latin beryllium, from beryllus, from Ancient Greek βήρυλλος (berullos, “beryl”), + -ium.