D defs.my
Entry 3 senses Webster, 1913

Coarctation

· Co·arc·ta·tion · IPA /ˌkoʊˌɑɹkˈteɪ.ʃən/
01 n. Confinement to a narrow space.
  1. 1.
    Confinement to a narrow space.[Obs.]
  2. 2.
    Pressure; that which presses.[Obs.]
  3. 3.
    A stricture or narrowing, as of a canal, cavity, or orifice.(Med.)