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isotonic sodium chloride solution

noun Pharmacology.
  1. an aqueous solution of 0.9 percent sodium chloride, isotonic with the blood and tissue fluid, used in medicine chiefly for bathing tissue and, in sterile form, as a solvent for drugs that are to be administered parenterally to replace body fluids.
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Origin of isotonic sodium chloride solution

First recorded in 1965–70
Also called normal saline solution, physiological salt solution, physiological sodium chloride solution.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018