#oligodendrocyte  a cell of the oligodendroglia
  supertype:  #neurogliacyte__neuroglial_cell__glial_cell__glialcell  a cell of the neuroglia
  part of:  #oligodendroglia  tissue consisting of glial cells with sheet-like processes that form the myelin sheath of nerve fibers
     part of:  #medullary_sheath__medullarysheath__myelin_sheath  a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
        part of:  #medullated_nerve_fiber__myelinated_nerve_fiber  a nerve fiber encased in a sheath of myelin

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