INNOMINATUM OS
\ɪnnˌɒmɪnˈɑːtəm ˌə͡ʊˈɛs], \ɪnnˌɒmɪnˈɑːtəm ˌəʊˈɛs], \ɪ_n_n_ˌɒ_m_ɪ_n_ˈɑː_t_ə_m ˌəʊ_ˈɛ_s]\
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A very large, flat bone, which forms the anterior and lateral paries of the pelvis. It is curved upon itself in two opposite directions. In the first periods of life, it is composed of three portions; - the ilium, ischium, and pubis, which join each other in the acetabulum. It is articulated before with its fellow, - behind with the sacrum; and laterally with the femur.
By Robley Dunglison
