cranial fossa
noun
: any of the three large depressions in the posterior, middle, and anterior aspects of the floor of the cranial cavity:
a
: the posterior one that is the largest and deepest of the three and lodges the cerebellum, pons, and medulla oblongata
called also posterior cranial fossa, posterior fossa
b
: the middle one that lodges the temporal lobes laterally and the hypothalamus medially
called also middle cranial fossa, middle fossa
c
: the anterior one that lodges the frontal lobes
called also anterior cranial fossa, anterior fossa
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Merriam-Webster unabridged
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