Source : Webster's Revised Unabridged Dictionary (1913)

Epicranium \Ep`i*cra"ni*um\, n. [NL. See {Epi-}, and {Cranium}.]
   1. (Anat.) The upper and superficial part of the head,
      including the scalp, muscles, etc.

   2. (Zo["o]l.) The dorsal wall of the head of insects.

Source : WordNet®

epicranium
     n : the muscle and aponeurosis and skin covering the cranium