What is the medical term for narrowing?

The medical term for narrowing is "stenosis." This term is commonly used in various medical contexts to describe a constriction or narrowing of a bodily passage or vessel, such as blood vessels, certain parts of the digestive tract, or other tubular structures.

For example, spinal stenosis refers to the narrowing of the spinal canal, which can lead to pain or neurological issues due to pressure on the spinal cord and nerves. This term is derived from the Greek word "stenos," meaning narrow.

While other terms provided have their medical meanings, they do not specifically refer to the concept of narrowing. Prolapse refers to the slipping or falling out of position of an organ, sclerosis refers to the hardening of tissue often due to chronic inflammation, and stasis indicates a stoppage or slowing of fluid flow. None of these terms encapsulate the idea of narrowing in the way that stenosis does.