Noun

1. A soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
2. The basic unit of luminous intensity adopted under the systeme international d'unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees kelvin
3. A debt instrument issued by a bank; usually pays interest
4. A digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser