umbilical vein
Medical term for the vein in the umbilical cord that carries oxygenated blood from the placenta to the fetus.
The umbilical vein is an important blood vessel that supplies oxygen to the fetus.
Compound of 臍帯 (umbilical cord) and 静脈 (vein). The exact historical derivation is uncertain; the spelling is conventionally associated with the medical meaning.