heelball

n.

（鞋匠上光用的）硬蜡和煤烟混合物；脚踵底部；

Heel-ball (HB) index: sexual dimorphism of a new index from foot dimensions.
Heel–Ball index: An analysis of footprint dimensions for determination of sex
The research on the walking for each type biomechanical effect according to the Last Heel Ball Offset height variation
Show-Me Kings: Bootheel Ball, the Cookson Clan, & a Run- And- Gun All-Star Show
"HEEL-BALL"or "COBBLERS' WAX"
"HEEL-BALL"OR "COBBLERS' WAX."
Estimation of Sex from Foot Print using Standard Footprint Length Formula, Heel Ball Index and Foot Index
Flinders Petrie: A Life in Archaeology
Footwear with reinforced sole - has side jutting-out part, and heel, ball of foot and toe reinforcement
Automatic predicate abstraction of C programs