Meaning of isotonic

i•so•ton•ic

Pronunciation: (ī"su-ton'ik), [key]
— adj.
  1. noting or pertaining to solutions characterized by equal osmotic pressure. Cf. hypertonic (def. 2),(def. 2).
    1. noting or pertaining to a solution containing the same salt concentration as mammalian blood.
    2. noting or pertaining to a muscular contraction in which constant tension continues while the length of the muscle decreases, as during mechanical work.
  2. of or characterized by equal tones.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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