metapodium
/ˌmɛtəˈpəʊdɪəm/(also metapode)
noun
1 Anatomy and Zoology. Originally: the metatarsus. Later also: the metatarsus or metacarpus; (occasionally) a metapodial bone.
2 Zoology. The posterior lobe of the foot in certain molluscs.
Origin
Mid 19th century; earliest use found in Robley Dunglison (1798–1869), physician and medical writer. From meta- + -podium, after post-classical Latin metapedium, with substitution of ancient Greek ποδ-, πούς for classical Latin ped-, pēs.