metatarsusPronunciation: /ˌmɛtəˈtɑːsəs/Definition of metatarsus noun (plural metatarsi /-sʌɪ, -siː/) 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 US English dictionary