Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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Cd symbol of the chemical element cadmium.
CD1 abbreviation of "compact disk," a palm-sized disk on which music, data, or the like has been digitally encoded, that is read by laser and transmitted to a playback device; optical disk.
CD2 abbreviation of "certificate of deposit," a document issued by a savings institution stating that the named person has a specified sum of money on deposit.