- Main Entry:
- ductus ar·te·ri·o·sus

- Pronunciation:
-
\-är-ˌtir-ē-ˈō-səs\
- Function:
- noun
: a short broad vessel in the fetus that connects the pulmonary artery with the aorta and conducts most of the blood directly from the right ventricle to the aorta bypassing the lungs