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Pronunciation: bownd


  1. Limited; circumscribed; enclosed.
  2. Denoting a substance, such as iodine, phosphorus, calcium, morphine, or some other drug, which is not in readily diffusible form but exists in combination with a high molecular weight substance, especially protein.
  3. Fixed to a receptor, such as on a cell membrane.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.