archencephalon


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arch·en·ceph·a·lon

 (är′kĕn-sĕf′ə-lŏn′)
n. pl. arch·en·ceph·a·la (-lə)
The part of the primitive embryonic brain from which the forebrain and midbrain develop.

arch•en•ceph•a•lon

(ˌɑr kɛnˈsɛf əˌlɒn)

n., pl. -lons, -la (-lə)
the primitive forebrain region of the embryo that is anterior to the notochord and gives rise to the midbrain and forebrain.
[1930–35]