1. (noun)candle, candela, cd, standard candle 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: wax light, taper, compact disc, candela, atomic number 48, cd, standard candle, candle, compact disk, certificate of deposit, cadmium