Music history of the United States in the 1950s blues and gospel music; with country and western and Pop. In 1951, Cleveland, Ohio disc jockey Alan Freed began playing rhythm and blues music for a multi-racial audience, and is credited with first using the phrase "rock and roll" to describe the music, though the terms "rocking" and "rolling" were being used in boogie-woogie and religious music for decades before that. The 1950s saw the growth in popularity of the electric guitar (developed and popularized by Les Paul). Paul's hit records like "How High the Moon," and "The World Is Waiting for the Sunrise," helped lead to the development of
Rock and roll backbeat, that are now more commonly called simply "rock music" or "rock". The term "rock and roll" now has at least two different meanings, both in common usage. The "American Heritage Dictionary" and the "Merriam-Webster Dictionary" both define rock and roll as synonymous with rock music. "Encyclopædia Britannica", on the other hand, regards it as the music that originated in the mid-1950s and later developed "into the more encompassing international style known as rock music". The phrase "rocking and rolling" originally described the movement of a ship on the ocean, but was used by the early twentieth century, both to