transversarium UK /ˌtɹæns.vɜːˈsɛəɹi.əm/US /ˌtɹæns.vɝˈsɛɹi.əm/ noun1 •A transverse process in a vertebraThe transverse process protrudes between the cranial and caudal openings of the foramen transversarium. — 2015 formstransversaria