sinus venosus

noun
si·nus ve·no·sus | \ˈsī-nəs-vi-ˈnō-səs \

Definition of sinus venosus 

: 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

First Known Use of sinus venosus

circa 1839, in the meaning defined above

History and Etymology for sinus venosus

New Latin, venous sinus

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The first known use of sinus venosus was circa 1839

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sinus venosus

noun
si·nus ve·no·sus | \ˌsī-nəs-vi-ˈnō-səs \

Medical Definition of sinus venosus 

: 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

More from Merriam-Webster on sinus venosus

Britannica.com: Encyclopedia article about sinus venosus

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