cd

1. is a type of: metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
   substance meronym: calamine, hemimorphite - a white mineral; a common ore of zinc
   same as: atomic number 48, cadmium
2. is a type of: candlepower unit, luminous intensity unit - a measure of luminous intensity
   same as: candela, candle, standard candle
3. is a type of: certificate of indebtedness, debt instrument, obligation - a written promise to repay a debt
   subtypes: time deposit - a certificate of deposit from which withdrawals can be made only after advance notice or at a specified future date
   same as: certificate of deposit
4. is a type of:

   • optical disc, optical disk - a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
   • recording - a storage device on which information (sounds or images) have been recorded
   subtypes:

   • audio cd, audio compact disc - compact discs used to reproduce sound (voice and music)
   • cd-r, cd-wo, compact disc recordable, compact disc write-once - a compact disc on which you can write only once and thereafter is read-only memory
   • cd-rom, compact disc read-only memory - a compact disk that is used with a computer (rather than with an audio system); a large amount of digital information can be stored and accessed but it cannot be altered by the user
   same as: compact disc, compact disk

1. similar to: cardinal - being or denoting a numerical quantity but not order
   same as: 400, four hundred

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