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.
Granuloma annulare is a disorder that causes bumps or ring-shaped lesions on your skin, especially your hands, feet, elbows or knees. The bumps are red, purple, skin-colored or pearly white, and they sometimes itch. Most granuloma annulare bumps disappear on their own after a few months.