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bolus definition

bo·lus (bō′ləs)

noun pl. boluses bo′·luses

  1. a small, round lump or mass, as of chewed food
  2. Med. a mass injected into a blood vessel, as an opaque contrast medium or a radioactive tracer
  3. Vet.Med. a large pill

Etymology: ML: see bole

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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