coarctations

noun
  1. Plural of coarctation; abnormal narrowing or constriction of a blood vessel or other tubular structure in the body.
  2. Usage: Medical/anatomical term; Most commonly refers to coarctation of the aorta, a congenital heart condition
  3. The act or process of constricting or compressing; a state of being constricted.
  4. Usage: Formal or archaic usage

Examples