Define nadir. nadir synonyms, nadir pronunciation, nadir translation, English dictionary definition of nadir. n. 1. Astronomy A point on the celestial sphere directly below the observer, diametrically opposite the zenith. 2. The lowest point: the nadir of their...
Annular tear â definition and causes. By Michael Perry, M.D. An annular tear is one of the most common degenerative spine conditions that develop with the natural aging process of the spine. In fact, many people over the age of 50 have an annular tear and never know it.
Annular Tear or Annular Fissure - The Clash of the Words. Note that, annular tear is not a standard term doctors use to describe or diagnose this condition. The reason is that the word tear suggests that some type of trauma lead to the separation or break in the fibers.