evertebral,a.Anat.|iːˈvɜːtɪbrəl| [f. e- prefix3 + L. vertebr-a + -al1; cf. vertebral.] Not vertebral; not of the nature of, or not connected with, the vertebral column. 1878Bell Gegenbauer's Comp.Anat. 447 The anterior, or evertebral portion [of the cranium].