heavy metal
noun uk/ˌhev.i ˈmet.əl/ us/ˌhev.i ˈmet̬.əl/
(METAL)
[ C ] chemistry specialized重金属（密度大且通常有毒的金属）
a dense (= heavy in relation to its size) and usually poisonous metal, such as lead
(MUSIC)
[ U ]重金属摇滚乐
a style of rock music with a strong beat, played very loudly using electric guitars