OBURATOR FORAMEN
\ˈɒbjʊɹˌe͡ɪtə fˈɔːɹe͡ɪmˌɛn], \ˈɒbjʊɹˌeɪtə fˈɔːɹeɪmˌɛn], \ˈɒ_b_j_ʊ_ɹ_ˌeɪ_t_ə f_ˈɔː_ɹ_eɪ_m_ˌɛ_n]\
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A large opening, of an oval or triangular form, in the anterior part of the os innominatum, on the outside of the symphysis pubis and beneath the horizontal ramus of the os pubis. This foramen is closed by a membranous ligament.
By Robley Dunglison
