truncus arteriosus

/T R AH1 NG K AH0 S AA0 R T IH0 R IY0 OW0 S AH0 S/
noun
  1. 1

    (embryology) The single arterial outlet in the embryological heart which later divides into the aorta and the pulmonary trunk.

  2. 2

    (pathology) Ellipsis of persistent truncus arteriosus. [(pathology) A congenital cardiac defect characterised by the failure of division of the embryological structure of truncus arteriosus.]

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