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" पर्याय: medulla oblongata, bulb,
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers पर्याय: myelin, myeline,