Rhinorrhea
Medical term for a runny nose. From the Greek words “rhinos” meaning “of the nose” and “rhoia” meaning “a flowing.”
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RhO(D) immune globulin, an injectable drug that is used to protect an Rh+ fetus from antibodies in an Rh- mother’s blood and to prevent Rh allergy in the mother.
- Rhythm method
Also known as fertility awareness, natural family planning, and periodic abstinence, this approach to contraception entails not having sexual intercourse on the days of a woman’s menstrual cycle when she could become pregnant or using a barrier method (such as a condom, the diaphragm or a cervical cap) for birth control on those days. Because […]
- Rhythm, sinus
The normal regular rhythm of the heart set by the natural pacemaker of the heart called the sinoatrial (or sinus) node. It is located in the wall of the right atrium (the right upper chamber of the heart). Normal cardiac impulses start there and are transmitted to the atria and down to the ventricles (the […]
- Rib
One of the 12 paired arches of bone that form the skeletal structure of the chest wall (the rib cage). The ribs attach to the vertebrae of the spine in the back. The 12 pairs of ribs consist of 7 pairs of ribs that attach to the sternum in the front and are known as […]