Dictionary

ulcerative proctitis Ulcerative colitis that is limited to the rectum. See also colitis, ulcerative.

ulcerative stomatitis See acute membranous gingivitis.

ulna The larger of the two long bones within the forearm. (The smaller one is the radius.) The ulna is on the same side of the arm as the little finger.

ulnar Pertaining to the ulna, the larger bone in the forearm.

ulnar nerve A major nerve in the upper extremity that supplies both sensory and motor innervation to parts of the forearm and hand.

ultrasonic-assisted liposuction See liposuction, ultrasonic-assisted.

ultrasound High-frequency sound waves. Ultrasound waves can be bounced off tissues by using special devices. The echoes are then converted into a picture called a sonogram. Ultrasound imaging allows an inside view of soft tissues and body cavities without the use of invasive techniques. Ultrasound is often used to examine a fetus during pregnancy. There…

ultrasound, transvaginal See transvaginal ultrasound.

ultraviolet A See ultraviolet radiation.

ultraviolet B See ultraviolet radiation.

ultraviolet C See ultraviolet radiation.

ultraviolet radiation Invisible rays that are part of the energy that comes from the sun. Abbreviated UV. UV radiation is made up of three types of rays: ultraviolet A (UVA), ultraviolet B (UVB), and ultraviolet C (UVC). UVC is the most dangerous type of UV light in its potential to harm life on earth, but…