Definition of ductus in English:

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Pronunciation: /ˈdʌktəs/

noun (plural ducti /ˈdʌktʌɪ/)

A duct: ductus venosus
More example sentences
  • 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.


Mid 17th century: from Latin, literally 'leading'.

For editors and proofreaders

Line breaks: ductus

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