Noun
-
the inner part of an organ or structure in plant or animal
-
lower or hindmost part of the brain
continuous with spinal cord
(`bulb' is an old term for medulla oblongata)
"the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
- medulla oblongata -
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers