Ductus-arteriosis
[duhk-tuh s ahr-teer-ee-oh-sis] /ˈdʌk təs ɑrˌtɪər iˈoʊ sɪs/
noun, Anatomy.
1.
a fetal blood vessel that connects the left pulmonary artery directly to the descending aorta, normally closing after birth.
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