two crossed bones (or a representation of two crossed bones) used as a symbol danger or death
crossbones详细解释
cross.bones pl.n.（复数名词）A representation of two bones placed crosswise, usually under a skull, symbolizing danger or death.交叉骨圆形：描绘两根骨头交叉放置的图形，通常画在骷髅下面，象征危险或死亡
