U (uracil)
A nucleotide base and one member of the A-U (adenine-uracil) base pair in RNA. The other base pair in RNA is G-C (guanine-cytosine).
Uracil takes the place in RNA that thymine (T) occupies in DNA.
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- Usher syndrome
The most common disease that diminishes both hearing and vision, a group of genetic disorders in which retinitis pigmentosa (an eye disease that causes vision to deteriorate over time) is combined with congenital deafness. The hearing loss in a patient with Usher syndrome occurs in both ears as a result of nerve deafness. Some patients […]
- USP
United States Pharmacopeia.
- USPHS (United States Public Health Service)
There currently are more than 6,100 officers on active duty. Officers are assigned to all of the PHS Agencies and to a number of agencies outside of PHS, including the Bureau of Prisons, U. S. Coast Guard, Environmental Protection Agency, Health Care Financing Administration, and the Commission on Mental Health of the District of Columbia.
- ut dict.
If a medicine is to be taken every so-many hours (from “quaque”, every and the “h” indicating the number of hours) q.h. = every hour q.2h. = every 2 hours q.3h. = every 3 hours q.4h. = every 4 hours t.i.d. = three times a day (from “ter in die”, 3 times a day)
- Uterine bleeding
Menstruation. See also Menometrorrhagia; Menorrhagia; Metrorrhagia.