PROSENCEPHALON
forebrain, prosencephalon
(noun) the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube
Source: WordNet® 3.1
Etymology
Noun
prosencephalon (plural prosencephalons or prosencephala)
(neuroanatomy) Forebrain.
Source: Wiktionary
Pros`en*ceph"a*lon, n. Etym: [NL., fr. Gr. encephalon.] [Sometimes
abbreviated to proen.] (Anat.)
(a) The anterior segment of the brain, including the cerebrum and
olfactory lobes; the forebrain.
(b) The cerebrum. Huxley.
Source: Webster’s Unabridged Dictionary 1913 Edition