encephalon
Concise Oxford English Dictionary © 2008 Oxford University Press:
encephalon /ɛnˈsɛfəlɒn, -ˈkɛf-/
▶noun Anatomy the brain.
– origin C18: from Gk enkephalon ‘what is inside the head’, from en- ‘inside’ + kephalē ‘head’.
'encephalon' also found in these Oxford entries:

