on principle

Medical Dictionary

principle prin·ci·ple (prĭn'sə-pəl)

  1. A basic truth, law, or assumption.

  2. A rule or law concerning the functioning of natural phenomena or mechanical processes.

  3. One of the elements composing a chemical compound, especially one that gives some special quality or effect.

  4. The essential ingredient in a drug.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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