Definition of ductus in English:



  • A duct.

    ‘ductus venosus’
    • ‘The duct contained in the ring joins the ductus pancreaticus near the duodenum.’
    • ‘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 ductus arteriosus usually closes within 24 hours of birth and is obliterated anatomically in 1-8 weeks.’
    • ‘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.’
    tube, channel, passage, canal, vessel
    View synonyms


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