M3Y4E1L1E1N1C3E1P3H4A1L1A1
25 points
MYELENCEPHALA is validvalid
MYELENCEPHALON, the region of the embryonic hindbrain that develops into the medulla oblongata*
MYELENCEPHALON, the posterior part of the developing vertebrate hindbrain or the corresponding part of the adult brain composed of the lower part of the brainstem