heavy metal

/ˈhɛv.i ˌmɛt.əl/

HƐV · i mɛt · əl (3 syllables)

English Noun

Definition

Any metal that has a specific gravity greater than about 5, especially one, such as lead, that is poisonous and may be a hazard in the environment. (There are many different definitions of what counts as a heavy metal; see Heavy metals for a discussion.)

Etymology

According to the Oxford World's Classics edition of Anthony Trollope's Rachel Ray (1863), "big guns," as on a warship. The origin of the music genre sense is often disputed; it was used by William S. Burroughs in Soft Machine and Nova Express and various music critics claim to have coined it: Sandy Pearlman, Lester Bangs and Mike Saunders.