arch·en·ceph·a·lon 
(är′kĕn-sĕfə-lŏn′)
(är′kĕn-sĕfə-lŏn′)n. pl. arch·en·ceph·a·la (-lə)
The part of the primitive embryonic brain from which the forebrain and midbrain develop.
- phenomenal
- phenomenalism
- phenomenalist
- phenomenalistic
- phenomenalistically
- phenomenally
- phenomenological
- phenomenologically
- phenomenologist
- phenomenology
- phenomenon
- phenothiazine
- phenotype
- phenotypic
- phenotypical
- phenotypically
- phenoxide
- phenoxybenzamine
- phentermine
- phentolamine
- phenyl
- phenylalanine
- phenylene
- phenylephrine
- phenylethylamine