metatarsus Syllabification: (met·a·tar·sus)Pronunciation: /ˌmetəˈtärsəs/Definition of metatarsus noun (plural metatarsi /-sē, -ˌsī/) the group of bones in the foot, between the ankle and the toes. the part of the foot between the ankle and the toes. Origin: late Middle English: modern Latin (see meta-, tarsus)metatarsus in other Oxford dictionaries Definition of metatarsus in the British & World English dictionary