[duhk-tuh s ahr-teer-ee-oh-sis]
a fetal blood vessel that connects the left pulmonary artery directly to the descending aorta, normally closing after birth.
Origin of ductus arteriosis
1805–15; < New Latin: literally, arterial channel
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019