hypertonic

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hypertonic

[‚hī·pər′tän·ik]
(physiology)
Excessive or above normal in tone or tension, as a muscle.
Having an osmotic pressure greater than that of physiologic salt solution or of any other solution taken as a standard.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.