postcardinal

adjective
post·car·di·nal | \-ˈkärd-nəl, -ᵊn-əl \

Medical Definition of postcardinal 

: of, relating to, or being a vein on either side in the embryo that drains the mesonephros and the portion of the trunk caudal to the heart

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exaggeratedly or childishly emotional

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