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Heavy metal, genre of rock and roll music that includes a group of related styles—from thrash metal to deathcore—that are intense, virtuosic, and powerful. Driven by the aggressive sounds of the distorted electric guitar, heavy metal is one of the most commercially successful genres of rock music. Although the origin of the term heavy metal is widely attributed to 20th-century American novelist William Burroughs, its use actually dates well back into the 19th century, when...