tar ‧ sus /ˈtɑːsəs $ ˈtɑːr-/ BrE AmE noun ( plural tarsi ) /-saɪ/ [countable]
[ Date: 1600-1700 ; Language: Modern Latin ; Origin: Greek tarsos 'bottom of the foot, ankle, edge of the eyelid' ]
technical your ↑ ankle , or one of the seven small bones in your ankle
—tarsal adjective