Isotonic I`so*ton"ic, a. [Iso- + tonic.] 1. Having or indicating, equal tones, or tension. [1913 Webster]

2. (Physiology, Biochemistry) Having an osmotic pressure (tonicity) equal to that of a reference solution; -- of aqueous solutions. Contrasting with {hypotonic} and {hypertonic}. See {hypertonic}. [PJC]

A knowledge of the colligative properties of solutions . . . is essential for one to understand fully the principles involved in rendering intravenous solutions isotonic with blood serum, or opthalmic solutions isotonic with lachrymal fluid. Solutions thus adjusted produce less shock and much less irritation than those which are hypotonic or hypertonic, and present-day practise recognizes the desirability of making the necessary adjustments whenever possible. --Cook & Martin (Remington's Practice of Pharmacy, Tenth Ed.: Mack Publ., Easton Pa., 1951)

{Isotonic system} (Mus.), a system consisting of intervals, in which each concord is alike tempered, and in which there are twelve equal semitones. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • isotonic — ISOTÓNIC, Ă adj. v. izotonic. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • isotonic — 1828, from Gk. isotonos of level pitch; equally stretched, from iso (see ISO (Cf. iso )) + tonos (see TENET (Cf. tenet)) …   Etymology dictionary

  • isotonic — [ī΄sō tän′ik, ī΄sətän′ik] adj. [< Gr isotonos (< isos, equal + tonos, a stretching: see TONE) + IC] 1. having equal tension 2. having the same osmotic pressure; esp., designating or of a salt solution having the same osmotic pressure as… …   English World dictionary

  • Isotonic — The term isotonic may refer to; * Isotonic muscle exercise and Weight training * Isotonic (exercise physiology) for the term associated with muscle contraction * An isotone in nuclear physics * Isotonic solutions, solutions that have equal… …   Wikipedia

  • isotonic — Of a fluid, having a concentration that will not cause osmotic volume changes of cells immersed in it. Note that an isotonic solution is not necessarily isosmotic. See hypotonic, hypertonic …   Dictionary of molecular biology

  • isotonic — adjective a) having the same osmotic pressure Use an isotonic saline solution in your neti pot to prevent irritation of your nasal passages. b) Having the same concentration of solutes as human blood …   Wiktionary

  • isotonic — 1. Relating to isotonicity or isotonia. 2. Having equal tension; denoting solutions possessing the same osmotic pressure; more specifically, limited to solutions in which cells neither swell nor shrink. Thus, a solution that is isosmotic with… …   Medical dictionary

  • isotonic — i|so|ton|ic [ ,aısə tanık ] adjective 1. ) an isotonic drink or other liquid replaces substances that your body needs but has lost, for example because you have done a lot of physical exercise 2. ) used for describing a type of exercise in which… …   Usage of the words and phrases in modern English

  • isotonic — UK [ˌaɪsəʊˈtɒnɪk] / US [ˌaɪsəˈtɑnɪk] adjective 1) an isotonic drink or other liquid replaces substances that your body needs but has lost, for example because you have done a lot of physical exercise 2) used for describing a type of exercise in… …   English dictionary

  • isotonic —    Having the same salinity as body fluids. You can make a quart of water isotonic by adding a slightly rounded measuring teaspoon of table salt to a quart of water …   Herbal-medical glossary

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