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Back to AIDS Prevention Home
AIDS Glossary
- ubiquitous
- widely present.
- ulcer (ulceration)
- an open sore of the skin or mucus membrane characterized by sloughing of inflamed dead tissue.
- ultrasonography (ultrasound)
- a method of visualizing the internal parts of the body, or a fetus within the uterus, using sound waves.
- ultraviolet (uv)
- electromagnetic radiation beyond the violet end of the visible light spectrum. UV radiation induces tanning and sunburn of the skin, and is associated with the development of skin cancer. UV is used to kill Mycobacterium tuberculosis in hospitals.
- umbilical cord
- the cord that connects the fetus to the maternal placenta, providing nutrients and removing wastes. See also cord blood.
- uncontrolled trial
- a research study in which there are no participants taking a placebo or a alternate therapy. Contrast with controlled trial, placebo-controlled trial.
- univariate analysis
- a statistical analysis that considers only one factor or variable at a time. Contrast with multivariate analysis.
- upregulation
- an increase in the rate at which a process occurs, a substance is released, etc.
- uracil (u)
- one of the pyrimidine nucleic acid bases that make up nucleotides, the building blocks of genetic material. Uracil takes the place of thymine (T) in RNA.
- ureaplasma
- a type of gram-negative bacteria found in the human genitourinary tract, throat and/or rectum. Ureaplasma may be sexually transmitted and is a cause of nongonococcal urethritis. Left untreated infection can lead to inflammation of the prostate in men and pelvic inflammatory disease in women.
- urethra
- the canal that carries urine from the bladder to the outside of the body.
- urethritis
- inflammation of the urethra.
- uric acid
- A substance found in the blood and urine that is a by-product of protein metabolism.
- urticaria
- itchy, raised, swollen areas on the skin or mucous membranes, often a manifestation of an allergic reaction. (hives)
- ut dict.
- pharmaceutical abbreviation, as directed (ut dictum)
- uterus
- the muscular pelvic organ of the female reproductive system in which the fetus develops. (syn. womb)
- uveitis
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- an inflammation of the membranes (uvea) of the eye. Anterior uveitis is an inflammation of the frontal membranes (e.g., the iris and the choroid). The condition is characterized by pain and redness.
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