archencephalon

[ahr-ken-sef-uh-lon]

arch·en·ceph·a·lon

[ahr-ken-sef-uh-lon]
noun Embryology.
the primitive forebrain region of the embryo, anterior to the notochord, that gives rise to the midbrain and forebrain.

Origin:
arch-2 + encephalon
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Archencephalon has a plethora of syllables.
So is supercalifragilisticexpialidocious. Does it mean:
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
(used as a nonsense word by children to express approval or to represent the longest word in English.)
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