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semi-membranosus
semi-membranosus n. 
/ˌsɛmiˌmɛmbrəˈnoʊsəs/
Brit. /ˌsɛmɪmɛmbrəˈnəʊsəs/
, /ˌsɛmɪmɛmbrəˈnəʊsəs/U.S. /ˌsɛˌmaɪˌmɛmbrəˈnoʊsəs/
, /ˌsɛˌmaɪˌmɛmbrəˈnoʊsəs//ˌsɛmiˌmɛmbrəˈnoʊsəs/ΚΠ
1733 G. Douglas tr. J. B. Winslow Anat. Expos. Struct. Human Body (1756) I. 216 Semi-Membranosus. This is a long thin Muscle, partly Tendinous, from whence it has its name.
1875 Turner in Encycl. Brit. I. 841/1 The biceps [is inserted] into the head of the fibula, and semi~tendinosus and semi-membranosus into the upper end of the tibia.
1896 Treves' Syst. Surg. II. 31 An enlargement of the bursa between the semi-membranosus and inner head of the gastrocnemius.
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