medical Definition of annulus fibrosus
- Disks between the vertebrae have a soft center—a nucleus pulposus—and a tougher exterior, annulus fibrosus.
- —Matthew Sturdevant, The Hartford (Connecticut) Courant, 30 May 2010
- The nucleus pulposus can bulge out or herniate the anulus fibrosus, but the disk itself does not “slip.”
- —John Palo, Newsday, 21 Feb. 1990