| Noun | 1. | Cd - a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores Synonyms: atomic number 48, cadmium |
| 2. | cd - 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. | CD - a debt instrument issued by a bank; usually pays interest Synonyms: certificate of deposit | |
| 4. | CD - a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser Synonyms: compact disc, compact disk | |
| Adj. | 1. | cd - being one hundred more than three hundred Synonyms: 400, four hundred |
| 1. | CD - Compact Disc | ||
| 2. | (operating system) | cd - change directory. | |
| 3. | (networking) | cd - The country code for the Democratic Republic of the Congo (formerly Zaire, zr). |
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