English
afterbrain
From after- + brain, a calque of German Nachhirn.
Proto-Germanic *bragną
Proto-West Germanic *bragn
Old English bræġn ‘brain’
Middle English brayn ‘brain’
English brain
Today it means
noun A posterior subdivision of the hindbrain; the myelencephalon.
Language periods are conventional ranges, not dates for this word.
Etymograph / afterbrain