Definition of ductus in English:



  • A duct.

    ‘ductus venosus’
    • ‘Near the prostate gland, the ductus is enlarged to form the ampulla; immediately thereafter, it is joined by the duct from the seminal vesicle.’
    • ‘The pulmonary artery - which, after birth, will carry blood from the heart to the lungs - instead sends blood directly back to the heart through a fetal blood vessel called the ductus arteriosus.’
    • ‘Before birth, a large artery called the ductus arteriosus lets the blood bypass the lungs because the fetus gets its oxygen through the placenta.’
    • ‘The duct contained in the ring joins the ductus pancreaticus near the duodenum.’
    • ‘The ductus arteriosus usually closes within 24 hours of birth and is obliterated anatomically in 1-8 weeks.’
    tube, channel, passage, canal, vessel


Mid 17th century from Latin, literally ‘leading’.