heelball
/ˈhiːlbɔːl/noun
mass noun
1- a mixture of hard wax and lampblack used by shoemakers for polishing蜡墨上光丸（一种固体蜡和灯烟的混合物, 鞋匠用以擦鞋）。
1.1
- this or a similar mixture used in brass rubbing用来擦黄铜制品的蜡墨上光丸（或类似混合物）。