Noun cns has 1 sense
  1. central nervous system, CNS, systema nervosum centrale - the portion of the vertebrate nervous system consisting of the brain and spinal cord
    --1 is a kind of system
    --1 is a part of nervous system, systema nervosum
    --1 has parts:
     neuroglia, glia; brain, encephalon; pyramidal tract, pyramidal motor system, corticospinal tract; spinal cord, medulla spinalis
    --1 has substances: white matter, substantia alba
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