Acetabulum - acteum, vinegar + abrum, holder. Small cup for vinegar, hence any small cup.⏎
Capitate - caput, head; thus rounded or shaped like the head.⏎
Cruciate - crux (crucis), a cross.⏎
Atlas - Atlas, mythical figure; Atlas supports the world on his shoulders.⏎
Biceps - bi, double; caput, head.⏎