cd

American Heritage® Dictionary of the English Language, Fourth Edition

1. abbr. candela.

Century Dictionary and Cyclopedia

1. n. The chemical symbol for cadmium.
2. n. In anatomy, an abbreviation used in vertebral formulas for caudal, or coccygeal: as, cd. 12 (that is, 12 caudal vertebræ).
3. An abbreviation of the French carte de visite (visiting-card).

Wiktionary

1. n. metrology Symbol for the candela, an SI unit of luminous intensity.
2. n. A Roman numeral representing four hundred (400).

GNU Webster's 1913

1. n. the chemical suymbol for cadmium, a metallic element of atomic number 48.
2. n. abbr. the abbreviation for the candela, the basic unit of luminous intensity adopted under the System International d'Unites.
3. n. an acronym for compact disk, a disk-shaped recording of binary data that is smaller than a phonograph record, and is recorded and played back by a compact disk player, an electronic device containing a laser. The term is also used generically to refer to the medium as a data storage medium.
4. n. informal a compact disk player.
5. n. an acronym for certificate of deposit, a debt instrument issued by a bank for a fixed time period, usually paying interest.

WordNet 3.0

1. adj. being one hundred more than three hundred
2. n. a debt instrument issued by a bank; usually pays interest
3. n. a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
4. n. 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
5. n. a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser