Pronunciation: (ī"su-ton'ik), [key]
1. Also,isosmotic. Physical Chem.noting or pertaining to solutions characterized by equal osmotic pressure. Cf. hypertonic (def. 2), hypotonic (def. 2).
2. Physiol.
a. noting or pertaining to a solution containing the same salt concentration as mammalian blood.
b. noting or pertaining to a muscular contraction in which constant tension continues while the length of the muscle decreases, as during mechanical work.
3. Music.of or characterized by equal tones.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

isotoneisotonic exercise
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