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vena 音标拼音: [v'inə] n. 静脉 静脉 vena n 1: a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood" [synonym: {vein}, {vena}, {venous blood vessel}] Vena \Ve"na\, n.; pl. {Venae}. [L. See {Vein}.]
A vein. [1913 Webster] {Vena cava}; pl. {Venae cavae}. [L., literally, hollow vein.] (Anat.) Any one of the great systemic veins connected directly with the heart. {Vena contracta}. [L., literally, contracted vein.] (Hydraulics) The contracted portion of a liquid jet at and near the orifice from which it issues. {Vena portae}; pl. {Venae portae}. [L., literally, vein of the entrance.] (Anat.) The portal vein of the liver. See under {Portal}. [1913 Webster]
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