pros·en·ceph·a·lon /ˌprɑsˌɛnˈsɛfəˌlɑn, lən/
  前腦
  pros·en·ceph·a·lon /ˌprɑsˌɛnˈsɛfəˌlɑn, lən/ 名詞
  Pros·en·ceph·a·lon n.  [Sometimes abbreviated to proen.] Anat. (a) The anterior segment of the brain, including the cerebrum and olfactory lobes; the forebrain. (b) The cerebrum.
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  prosencephalon
       n : the anterior portion of the brain; the part of the brain
           that develops from the anterior part of the neural tube
           [syn: forebrain]
       [also: prosencephala (pl)]