Artificial intelligent assistant

coarction

coˈarction Obs. rare.
  [f. coarct v., after act-ion, etc.: see -ion1.]
  Coarctation, constriction.

1782 A. Monro Compar. Anat. (ed. 3) 7 Nor is there any coarction forming the antrum willisii as in the stomach of man. Ibid. 18 These coarctions give way in the time of birth.

Oxford English Dictionary

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