A large opening in the hipbone between the pubis and the ischium.
- The remainder of the ischium joins with the pubis to form the obturator foramen.
- It originates at the medial surface of the pubis, covers the obturator foramen, and passes by the lesser sciatic notch.
- Radiography showed mature bone fragments in the obturator foramen.
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Syllabification: ob·tu·ra·tor fo·ra·men
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