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disk

noun

  1. a thin, flat, circular thing of any material
  2. anything like this in form: the moon's disk
  3. any of the sharp, circular blades of a disk harrow
  4. Anat. a layer of fibrous connective tissue with small masses of cartilage among the fibers, occurring between adjacent vertebrae
  5. Bot.
    1. disk flower
    2. a circular nectary around the center of some flowers
  6. a thin, flat, circular plate coated with ferromagnetic particles, on which computer data can be stored
  7. disc
  8. Obsolete discus

See disk in American Heritage Dictionary 4

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