Meaning of isotonic in English:


Pronunciation /ˌʌɪsə(ʊ)ˈtɒnɪk/

Translate isotonic into Spanish


  • 1Physiology
    (of muscle action) taking place with normal contraction.

    ‘These properties are in agreement with recent experiments on the isotonic response of single muscle fibers carried out by Edman and Curtin.’
    • ‘A good example of isotonic contraction would be free weight training.’
    • ‘This exercise piece is specifically designed for isometric and isotonic neck muscle testing and exercise.’
    • ‘A graduated program of swimming and stationary bicycling, along with isometric, isotonic, and eccentric strengthening in the later stages is prescribed.’
    • ‘The existence of damped oscillations in the isotonic transient response of single muscle fibers therefore argues in favor of the oscillating regime.’
  • 2Physiology
    Denoting or relating to a solution having the same osmotic pressure as some other solution, especially one in a cell or a body fluid.

    ‘Any solutions, such as antibiotic or isotonic solution, should be included on the label.’
    • ‘Vasopressin continued to act in patients excreting isotonic or hypertonic urine, so hypotonic intake must be avoided in them.’
    • ‘Standard BAL was then performed using three aliquots of 50-ml sterile isotonic saline.’
    • ‘The purpose of this activity is to teach the students about osmosis and the effects of hypotonic, hypertonic, and isotonic solutions on animal cells.’
    • ‘The fluid that surrounds the body cells is isotonic.’
    1. 2.1(of a drink) containing essential salts and minerals in the same concentration as in the body and intended to replace those lost as a result of sweating during vigorous exercise.
      ‘When you start the London marathon, you've got crowds cheering, you've got pretty girls giving you isotonic drinks.’
      • ‘I will start with nutritional supplements, gels, isotonic drinks, power bars and creatine.’
      • ‘It was a mile and a half up a long hill, before I reached the next isotonic drinks station.’
      • ‘Sometimes it is better to consume isotonic drinks where the carbohydrate source is a concentrated form of glucose.’
      • ‘Constar supplies a range of hot-filled beverage bottle sizes for the full range of juice and isotonic beverage applications.’
      • ‘According to Productscan, PepsiCo launched the most isotonic, energy producing beverages globally in the 12 months to May 2007, followed by The Coca-Cola Company.’


Early 19th century (as a musical term designating a system of tuning, characterized by equal intervals): from Greek isotonos, from isos ‘equal’ + tonos ‘tone’.