Meaning of isotonic sodium chloride solution

i'soton'ic so'dium chlo'ride solu"tion

Pronunciation: [key]
— Pharm. Pharm.
  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. Also calledCf. Ringer's solution.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.