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.
- put through paces
- put through someone's paces
- put through the wringer
- putti
- putting green
- put to
- putto
- put to bed
- put to death
- put together
- put to it
- putto rest
- put to shame
- put to sleep
- put to the sword
- put to the torch
- putt-putt
- put two and two together
- putty
- putty knife
- puttyroot
- Putumayo
- put up
- put-up
- put upon