cardinal vein

noun
car·​di·​nal vein | \ˌkärd-nəl-, -ᵊn-əl- \

Medical Definition of cardinal vein 

: any of four longitudinal veins of the vertebrate embryo running anteriorly and posteriorly along each side of the spinal column with the pair on each side meeting at and discharging blood to the heart through the corresponding duct of Cuvier

called also cardinal sinus, Cuvierian vein

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