coarctation

noun3

1. •
   A congenital stricture or narrowing of a short section of the aorta.
2. •
   (no longer used) A confinement to a narrow space.

   • So likewise the greatest winds, if they have no coarctation, or blow not hollow, give an interior sound — 1627
3. •
   (no longer used) A pressure; that which presses.

   • the vessel will notwithstanding continue still to beat below or beyond the coarctation — 1691