Dictionary

INR International normalized ratio.

insect sting A sting from a stinging insect, such as a bee, hornet, yellow jacket, or wasp, that can trigger allergic reactions. These reactions vary greatly in severity. Avoidance and prompt treatment are essential. In selected cases, allergy injection therapy is highly effective.

insemination The deposition of semen in the female reproductive tract. With sexual intercourse, the deposit is made within the vagina or the cervix. By artificial means, such as intrauterine insemination, the deposit can be made directly into the uterus.

insertion A chromosome abnormality that is due to insertion of a segment from one chromosome into another chromosome.

insomnia The perception or complaint of inadequate or poor-quality sleep due to a number of factors, such as difficulty falling asleep, waking up frequently during the night with difficulty returning to sleep, waking up too early in the morning, or unrefreshing sleep. Insomnia is not defined by the number of hours of sleep a person…

Institute of Medicine A nonprofit organization established in 1970 as a component of the US National Academy of Sciences that works outside the framework of government to provide evidencebased research and recommendations for public health and science policy. Abbreviated IOM. The IOM is also an honorific membership organization.

insufficiency, pancreatic See pancreatic insufficiency.

infection, pinworm See pinworm infestation.

infection, primary HIV See HIV infection, primary.

infection, rotavirus See rotavirus.

infection, urinary tract See urinary tract infection.

infection, Vincent See acute membranous gingivitis.