Olecranon - olekranon, point of the elbow.⏎
Phrenic - phren, diaphragm.⏎
Occipital - occipitum, back part of head.⏎
Obturator - obturare, to occlude; obturator foramen was named because it is largely occluded by the obturator membrane.⏎
Quadriceps - quadri, four; caput, head.⏎