English Dictionary

piriformis

/ˌpɪ.ɹɪˈfɔː.mɪs/

noun

(anatomy, zootomy) A gluteal muscle which arises from the front of the sacrum and the ischium or sacrotuberous ligament, passes out of the pelvis through the greater sciatic foramen, and inserts into the greater trochanter of the femur, serving in humans to rotate the thigh laterally.

The piriformis is a small muscle located deep in the buttock region.

意味（1）

(anatomy, zootomy) A gluteal muscle which arises from the front of the sacrum and the ischium or sacrotuberous ligament, passes out of the pelvis through the greater sciatic foramen, and inserts into the greater trochanter of the femur, serving in humans to rotate the thigh laterally.