Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: ductus arteriosus
  1. A blood vessel in a foetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth

Type of: blood vessel

Part of: fetus, foetus [Brit, Cdn]

Encyclopedia: Ductus arteriosus, patent