From Longman Dictionary of Contemporary Englishfloppy diskˌfloppy ˈdisk (also floppy) noun [countable] TDa square piece of plastic that you can store computer information on, and which you can remove from and put into a computer → hard disk
Examples from the Corpus
floppy disk• Here you can copy files, list files in other directories and even format a floppy disk.• Firmware upgrades can also be done remotely or with a floppy disk.• But you can attach a keyboard or computer monitor to it, along with an optional floppy disk.• The other kind is disk storage, commonly on a hard drive or floppy disk.From Longman Business Dictionaryfloppy diskˌfloppy ˈdisk (also floppy)COMPUTING a disk on which computer information is stored → disk 