pleurocentrum
/ˌplʊərə(ʊ)ˈsɛntrəm/Zoology and Palaeontology
noun
Each of a pair of bones in some primitive vertebrates corresponding to the lateral halves of the centrum of a vertebra in reptiles, birds, and mammals.
Origin
Late 19th century; earliest use found in Edward Cope (1840–1897). From pleuro- + centrum, after French pleurocentrum.