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ductus arteriosis

[duhk-tuh s ahr-teer-ee-oh-sis]
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noun Anatomy.
  1. 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. 2018