Innominate

Still washing the Dundee material....
I've always been rather tickled that the name of the hip-bone translates as "Not named".
The innominate is the most informative bone in the skeleton, apart from the skull. This is the inside view of the left bone of a woman of over fifty years old.
The broken bit in the blade of the ilium is post-depositional damage, other than that it is a complete bone, really quite rare to encounter in archaeological material.
Sex can be determined from the overall shape, especially the broad notch (greater sciatic notch) you can see on the left, and the angle of the pubic bone (not shown in this view).
The age can be estimated from the surfaces of the joints with the other parts of the pelvis which change in roughness and density over the course of life.
Both the pubic symphysis (out of focus here, on the lower right) and the auricular area for the sacrum (the ear-shaped area on the left) are almost completely flat and dense.