ALL meanings of foramen ovale
- noun foramen ovale (medicine, anatomy) An opening in the septum between the right and left atria of the fetal heart that normally closes after birth. 0
- noun foramen ovale the small, oval opening in the wall that separates the atria of the heart in a normal fetus: it allows blood to bypass the nonfunctioning fetal lungs until the time of birth when it gradually closes up 0