disc file1
/ˈdɪsk ˌfʌɪl/(US disk file) Engineering. Now rare
noun
An abrading file in the form of a disc.
Origin
Mid 19th century; earliest use found in U.S. Patents. From disc + file.
disc file2
/ˈdɪsk ˌfʌɪl/(US disk file) Computing
noun
A file stored on a disk; a file containing the contents of an entire disk.
Origin
1950s; earliest use found in IBM Journal Research & Development. From disc + file.