the part of the hand between the carpus and phalanges
metacarpus详细解释
met.a.car.pus n.（名词）【复数】met.a.car.pi[-po] The part of the human hand that includes the five bones between the fingers and the wrist.掌骨：人手的一部分，由手指与手腕之间的五根骨头构成The corresponding part of the forefoot of a quadruped.掌骨：四足动物前脚所对应的部分
