fossa ovalis

noun
fossa oval·​is | \ -ō-ˈva-ləs How to pronounce fossa ovalis (audio) , -ˈvā- How to pronounce fossa ovalis (audio) , -ˈvä- How to pronounce fossa ovalis (audio) \

Medical Definition of fossa ovalis

1 : a depression in the septum between the right and left atria that marks the position of the foramen ovale in the fetus

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