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Noun ductus arteriosus has 1 sense
  1. ductus arteriosus - a blood vessel in a fetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth
    --1 is a kind of     blood vessel
    --1 is a part of fetus, foetus
    --1 has particulars: patent ductus arteriosus
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