fascia lata

noun

fascia la·​ta -ˈlät-ə  -ˈlāt-ə 

plural fasciae latae -ˈlät-ē  -ˈlāt-ē 

: the deep fascia that forms a complete sheath for the thigh and has an opening in front just below the inguinal ligament for the passage of the great saphenous vein