SINCE 1828
fossa ovalis
noun
fossa oval·is
| \-ō-ˈva-ləs,
-ˈvā-,
-ˈvä-
\
-ˈvā-,
-ˈvä-
\
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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