isotonic

[ ahy-suh-ton-ik ]

adjective

1. Also Physical Chemistry. noting or pertaining to solutions characterized by equal osmotic pressure. Compare hypertonic ( def 2 ), hypotonic ( def 2 ).
2. Physiology.
   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. Music. of or characterized by equal tones.

isotonic

/ ˌaɪsəʊˈtɒnɪk; ˌaɪsəʊtəʊˈnɪsɪtɪ /

adjective

1. physiol (of two or more muscles) having equal tension
2. (of a drink) designed to replace the fluid and salts lost from the body during strenuous exercise
3. Alsoisosmotic (of two solutions) having the same osmotic pressure, commonly having physiological osmotic pressure Compare hypertonic hypotonic
4. music of, relating to, or characterized by the equal intervals of the well-tempered scale

   isotonic tuning

Derived Forms

• isotonicity, noun

Other Words From

• i·so·to·nic·i·ty [ahy-s, uh, -t, uh, -, nis, -i-tee], noun

Word History and Origins

Origin of isotonic¹

1820–30; < Greek isóton ( os ) having equal accent or tone ( iso-, tone ) + -ic

Example Sentences

Once the high-tech whiteboard work was done they walked through their new move in a hotel conference room, with bottles of beer, rather than isotonic, at hand.

From BBC

Donations continue to arrive with isotonic drinks, food, bandages and basic medical supplies dropped off by a constant stream of pick-up trucks and hatchbacks.

From BBC

The 21-year-old American's star power sells watches, isotonic drinks and sportswear as brands anticipate her impact on the greatest stage.

From BBC

A good time for the referee to call for isotonic beverages.

From The Guardian

A free bottle of calming isotonic pop, though, so it’s swings and roundabouts.

From The Guardian