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Medical Definition of Umbilical veins
1. Veins which carry oxygenated, nutrient-rich blood from the placenta and which are obliterated in the first few days after birth. (12 Dec 1998)
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1. Veins which carry oxygenated, nutrient-rich blood from the placenta and which are obliterated in the first few days after birth. (12 Dec 1998)