|1.||[ noun ] (anatomy,zoology,neuroscience) 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"
|Related terms:||neural_structure hindbrain brainstem respiratory_center|
|2.||[ noun ] (chemistry,food) a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers|
|Related terms:||fat medullary_sheath|
|3.||[ noun ] (botany,zoology) the inner part of an organ or structure in plant or animal|
|Related terms:||cortex plant_tissue animal_tissue adrenal_medulla|