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Meaning of herniated disk

her'niated disk'

Pronunciation: [key]
— Pathol. Pathol.
  1. an abnormal protrusion of a spinal disk between vertebrae, most often in the lumbar region of the spine, causing pain due to pressure on spinal nerves. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.