Definition of occipitofrontalis in US English:

occipitofrontalis

noun

Anatomy
  • More fully "occipitofrontalis muscle". A large flat muscle of the scalp, 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.

Origin

Early 18th century. From post-classical Latin occipito-frontalis from occipito- + frontalis.