What is the meaning of Occipitofrontalis?

A large flat muscle on each side of the vertex of the skull, consisting of an occipital portion (arising from the occipital and temporal bones) and a frontal portion that are separated by the epicranial aponeurosis, and serving to draw the scalp backwards, raising the eyebrows and wrinkling the forehead.

occipitofrontal

Source: wiktionary.org