An element not normally present in urine except in very small quantities.
A metallic element, symbol Be, atomic weight 9.0122, atomic number 4, specific gravity 1.848. It is used as a window in some x-ray tubes to produce a soft (low kilovoltage) beam appropriate for imaging soft tissue (mammography or specimen radiography) or for forensic and industrial radiography of extremely thin objects (e.g., a postage stamp or fingerprint).
A metallic mineral with a steel-grey hue, extensively utilized in the aerospace and nuclear sectors, as well as diverse manufacturing procedures.