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hyperosmolarity

(hī′pər-ŏz′mə-lărĭ-tē)
n.
  1. The abnormal increase in the osmolarity of a solution, especially a body fluid, as occurs in dehydration.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.