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Medical Definition of Marcille's triangle
1. An area bounded by the medial border of the psoas major, the lateral margin of the vertebral column, and the iliolumbar ligament below; it is crossed by the obturator nerve. (05 Mar 2000)
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1. An area bounded by the medial border of the psoas major, the lateral margin of the vertebral column, and the iliolumbar ligament below; it is crossed by the obturator nerve. (05 Mar 2000)