Hemapophysis :: Hemapophysis (n.) The second element in each half of a hemal arch, corresponding to the sternal part of a rib..
Hypapophysis :: Hypapophysis (n.) A process, or other element, of a vertebra developed from the ventral side of the centrum, as haemal spines, and chevron bones..
Pleurapophysis :: Pleurapophysis (n.) One of the ventral processes of a vertebra, or the dorsal element in each half of a hemal arch, forming, or corresponding to, a vertebral rib..
Zygapophysis :: Zygapophysis (n.) One of the articular processes of a vertebra, of which there are usually four, two anterior and two posterior. See under Vertebra..