compact-disc

The term "compact disc" is a modern compound noun formed in the late 20th century to describe a new data storage medium. The first element, "compact," draws on its Latin root meaning "to put together firmly," evolving to signify something dense and efficiently arranged, which perfectly describes the high data density achieved through digital encoding. The second element, "disc," originates from the Greek diskos (a throwing disc), via Latin, retaining its core meaning of a flat, circular shape. The compound thus logically names a device that stores a large amount of information ("compact") on a flat, round plate ("disc").

Structure: compact (dense) + disc (flat, circular object) - compact: From Latin compingere (to fasten together, construct). In this compound, it functions as an adjective meaning "densely packed or arranged," describing the high-density storage of data. - disc: From Latin discus (a circular plate, quoit). In this compound, it functions as a noun denoting the physical, flat, circular shape of the object.