metatarsus

n. 跖骨
【医】 跖, 跗基节

名词复数:metatarsi 

met.a.tar.sus

n.（名词）
【复数】 met.a.tar.si[-so, -sô]
The middle part of the human foot that forms the instep and includes the five bones between the toes and the ankle.
跖骨：人足形成足弓的中间部分，包括脚趾与脚踝间的五块骨头
The corresponding part of the hind foot in quadrupeds or of the foot in birds.
跖骨，跗跖骨：四足动物后足的相应部位或鸟爪的相应部位