cd
CD
(sE' dE') n.
an optical disk, usually 12 cm in diameter but sometimes smaller, that stores digital data in a format introduced by Sony and Phillips for recorded music c. 1980.
CD-R
(sE dE a:r') n.
a CD on which data can be recorded one time.
CD-ROM
(sE dE rom') n.
a CD that contains computer files.
CD-RW
(sE dE a:r' dub' l yU') n.
a CD on which data can be recorded and erased multiple times. CD-RWs have lower contrast than other CDs, so they cannot be read reliably in all CD devices.