tract

Noun
  1. An extended area of land (synset 108691133)
  2. A system of body parts that together serve some particular purpose (synset 105518558)
  3. A brief treatise on a subject of interest;
    Published in the form of a booklet (synset 106420933)
  4. A bundle of myelinated nerve fibers following a path through the brain (synset 105483530)

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