compact cassette

com·pact cas·sette

noun \kəm-ˈpakt  kə-ˈset\

Also known as audio cassette, cassette tape, cassette, tape, or abbreviated as c-cassette.

The compact cassette is a magnetic tape sound recording format. Incased in plastic, it contains a spool of 3.81 mm magnetic tape, spooled between two reels. The tape is run at a rate of 4.76 cm/second. A tape head in the tape player or deck, in contact with an exposed portion of the tape, interprets an analog signal from the tape’s magnetic surface.