radical

radical definition - medical

rad·i·cal (rădˈĭ-kəl)

noun Abbr. R
  1. A group of elements or atoms usually passing intact from one compound to another but generally incapable of prolonged existence in a free state.
  2. A free radical.
adjective
  1. Of or being medical treatment by extreme, drastic, or innovative measures.
  2. Designed to act on or eliminate the root or cause of a pathological process.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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