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Definitions of medulla
  1. noun
    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"

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  2. noun
    a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers

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    type of:
    fat
  3. noun
    the inner part of an organ or structure in plant or animal
    Opposite:
Explanation of medulla
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