FOSSULA PETROSA
\fˈɒsjʊlə pɛtɹˈə͡ʊsə], \fˈɒsjʊlə pɛtɹˈəʊsə], \f_ˈɒ_s_j_ʊ_l_ə p_ɛ_t_ɹ_ˈəʊ_s_ə]\
Definitions of FOSSULA PETROSA
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Petrosal fossa, a small and often but faintly marked depression on the inferior surface of the petrous portion of the temporal bone, between the jugular fossa and the external carotid foramen; here opens the canaliculus tympanicus transmitting the tympanic nerve.
By Stedman, Thomas Lathrop
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