单词	sinus venosus
释义	sinus venosus noun si·​nus ve·​no·​sus ˈsī-nəs-vi-ˈnō-səs  : an enlarged pouch that adjoins the heart, is formed by the union of the large systemic veins, and is the passage through which venous blood enters the heart in lower vertebrates and in embryos of higher forms Word History Etymology New Latin, venous sinus First Known Use circa 1839, in the meaning defined above Medical Definition sinus venosus noun si·​nus ve·​no·​sus ˌsī-nəs-vi-ˈnō-səs  : an enlarged pouch that adjoins the heart, is formed by the union of the large systemic veins, and is the passage through which venous blood enters the heart in lower vertebrates and in embryos of higher forms
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