any of the single bones or segments of the spinal column, articulating in the higher vertebrates with those adjacent to it by means of elastic fibrous disks
See vertebra in American Heritage Dictionary 4
(vûrˈtə-brə)
nounpl.ver·te·brae(-brāˌ, -brēˌ) or ver·te·bras
Any of the bones or cartilaginous segments forming the spinal column.