compact cassette

Noun

 * 1)  The standard cassette tape format introduced in 1963 by Philips; an audio cassette.

Synonyms

 * cassette tape {now synonymous with the original name "Compact Cassette", although originally there were competing cassette tape standards}
 * audio cassette or (frequently) simply: cassette
 * Compact Audio Cassette
 * music cassette {pre-recorded cassette, also known as Music-Cassettes, and later just Musicassettes; (M.C. for short)}