Pronunciation: (vûr'tu-bru), [key]
—pl. -braePronunciation: (-brē", -brā"), [key] -bras. Anat., Zool.
any of the bones or segments composing the spinal column, consisting typically of a cylindrical body and an arch with various processes, and forming a foramen, or opening, through which the spinal cord passes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.