isotonic
Americanadjective
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Physical Chemistry. Also noting or pertaining to solutions characterized by equal osmotic pressure.
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Physiology.
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noting or pertaining to a solution containing the same salt concentration as mammalian blood.
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noting or pertaining to a muscular contraction in which constant tension continues while the length of the muscle decreases, as during mechanical work.
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Music. of or characterized by equal tones.
adjective
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physiol (of two or more muscles) having equal tension
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(of a drink) designed to replace the fluid and salts lost from the body during strenuous exercise
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Also: isosmotic. (of two solutions) having the same osmotic pressure, commonly having physiological osmotic pressure Compare hypertonic hypotonic
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music of, relating to, or characterized by the equal intervals of the well-tempered scale
isotonic tuning
Other Word Forms
Etymology
Origin of isotonic
1820–30; < Greek isóton ( os ) having equal accent or tone ( see iso-, tone) + -ic
Vocabulary lists containing isotonic
Cell Biology - High School
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Chemistry - High School
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Physical Education - Middle School and High School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Hydration breaks, ice jackets, cooling towels and isotonic drinks have been a feature of the World Cup so far as hot weather impacts matches.
From BBC ● Jun. 17, 2026
In an isotonic condition, the relative concentrations of solute and solvent are equal on both sides of the membrane.
From Textbooks ● Jun. 9, 2022
Saline at a concentration that is isotonic with respect to body fluids.
From Textbooks ● Jun. 9, 2022
Solutions injected into the body must have the same osmotic pressure as blood serum; that is, they should be isotonic with blood serum.
From Textbooks ● Feb. 14, 2019
The solution is therefore practically isotonic with the stimulated muscle.
From The Mechanism of Life by Stéphane Leduc
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
