One of the mysteries of the English language finally explained.
A flat, fan-shaped muscle that covers the internal surface of the obturator foramen, and serves to rotate the thigh laterally.
Early 17th century; earliest use found in Helkiah Crooke (1576–1648), physician and anatomist. From post-classical Latin obturator internus from obturator + internus inner.
obturator internus/ˌɒbtjʊreɪtə(r) ɪnˈtəːnəs//ˈɒbtʃʊreɪtə(r) ɪnˈtəːnəs/
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