What causes vaginal dryness and vaginal atrophy? Vaginal atrophy is the medical term that refers to the thinning of the wall of the vagina that occurs during menopause (the time when menstrual periods have ceased) in women. Prior to menopause, the vaginal lining appears plump, bright red, and moist.
umbra. 1  shade or a shadow. 2  the dark central cone of shadow projecting from a planet or satellite on the side opposite the sun. 3  the dark central part of a sunspot. 4  Rare a phantom, or ghost. 5  Physics a perfect or complete shadow, in which no direct light is received from the source of illumination.
Umbo (n.) The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. Umbo (n.) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvae of echinoderms or in the tympanic membrane of the ear.