ductus venosus

noun
ductus ve·​no·​sus | \-vi-ˈnō-səs \

Medical Definition of ductus venosus 

: a vein passing through the liver and connecting the left umbilical vein with the inferior vena cava of the fetus, losing its circulatory function after birth, and persisting as the ligamentum venosum of the liver

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