oval foramen n.
The oval opening in the septum between the right and left atria of the fetal heart.
A large oval opening in the greater wing of the sphenoid bone, transmitting the mandibular nerve and a small meningeal artery.
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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |