RUL
Right upper lobe, the upper-right lobe of the lung.
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- Rule out
Term used in medicine, meaning to eliminate or exclude something from consideration. For example, a normal chest x-ray may “rule out” pneumonia.
- Rumination
1. Regurgitating food after a meal and then swallowing and digesting some of it. Cattle and other ruminant animals have a four-chambered stomach for the rumination of food and so can chew their cud. Some people, particularly infants, engage in something similar by regurgitating food after a meal and then swallowing and digesting some of […]
- Runny nose
The production of extra mucus by the nose. Rhinorrhea is the medical term for this common problem. The nose makes extra mucus whenever something that is in the nose, such as pollen or dust, needs to be removed. Mucus formation is also part of the histamine reaction to allergies and of the body’s defenses during […]
- Runx-1
A protein that is a transcription factor controlling when genes are switched on or off. Runx-1 acts by binding to regulatory sequences — specific sequences of DNA close to the genes they regulate. These DNA sequences, called Runx-1 binding sites, are scattered throughout the human genome, wherever there is a gene under the control of […]
- Rupture
A break or tear in any organ (such as the spleen) or soft tissue (such as the achilles tendon).