isotonic: Meaning and Definition of

i•so•ton•ic

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.
3. of or characterized by equal tones.