aberration

aberration definition - medical

ab·er·ra·tion (ăbˌə-rāˈshən)

noun
  1. A departure from the normal or typical.
  2. A psychological disorder or abnormal alteration in one's mental state.
  3. A defect of focus, such as blurring in an image.
  4. An imperfect image caused by a physical defect in an optical element, as in a lens.
  5. A deviation in the normal genetic structure or number of chromosomes in an organism.

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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