cd

(noun) a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores. Synonyms: cadmium, Cd, atomic number 48.

(noun) 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. Synonyms: candle, candela, standard candle.

(noun) a debt instrument issued by a bank; usually pays interest. Synonyms: certificate of deposit, CD.

(noun) a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser. Synonyms: compact disk, compact disc, CD.

(adj) being one hundred more than three hundred. Synonyms: four hundred, 400.