From Longman Dictionary of Contemporary EnglishCD-ROMCD-ROM /ˌsiː diː ˈrɒm $ -ˈrɑːm/ noun [countable, uncountable] 
TD (compact disc read-only memory) a CD on which large quantities of information can be stored to be used by a computerFrom Longman Business DictionaryCD-ROMCD-ROM /ˌsiː diː ˈrɒm-ˈrɑːm/ (also CD-Rom) noun [countable, uncountable]COMPUTING compact disc read-only memory; a small disk on which large quantities of information can be stored to be used by a computerA CD-ROM holds something over 600 Mb of data.The official journal of the EU is available on CD-ROM.
TD (compact disc read-only memory) a CD on which large quantities of information can be stored to be used by a computerFrom Longman Business DictionaryCD-ROMCD-ROM /ˌsiː diː ˈrɒm-ˈrɑːm/ (also CD-Rom) noun [countable, uncountable]COMPUTING compact disc read-only memory; a small disk on which large quantities of information can be stored to be used by a computerA CD-ROM holds something over 600 Mb of data.The official journal of the EU is available on CD-ROM. 