sacrotuberous

adjective
sacro·​tuberous | \"+\

Definition of sacrotuberous 

: of or relating to a ligament on each side passing from the back of the sacrum to the tuberosity of the ischium and converting the lesser sciatic notch of the innominate bone into the lesser sciatic foramen

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History and Etymology for sacrotuberous

sacr- entry 2 + tuberous

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