rhomboid fossa

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rhom·boid fos·sa

[TA]
the floor of the fourth ventricle of the brain, formed by the ventricular surface of the rhombencephalon.
Synonym(s): fossa rhomboidea [TA]

rhomboid fossa

The rhomboid-shaped anterior floor of the 4th ventricle of the brain, which in turn forms the roof of the medulla oblongata and the pons. It is divided into a triangular superior part, horizontal intermediate part and triangular inferior part.

rhom·boid fos·sa

(rom'boyd fos'ă) [TA]
The floor of the fourth ventricle of the brain, formed by the ventricular surface of the rhombencephalon.

rhomboid fossa

In the brainstem, the floor of the fourth ventricle, which runs along the dorsal surface of the pons and part of the medulla.
See also: fossa