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hypotonic

American  
[hahy-puh-ton-ik] / ˌhaɪ pəˈtɒn ɪk /

adjective

  1. Physiology. (of tissue) having less than the normal tone.

  2. Physical Chemistry. noting a solution of lower osmotic pressure than another solution with which it is compared (opposed to hypertonic).


hypotonic British  
/ ˌhaɪpəˈtɒnɪk, ˌhaɪpətəˈnɪsɪtɪ /

adjective

  1. pathol (of muscles) lacking normal tone or tension

  2. (of a solution) having a lower osmotic pressure than that of a specified, generally physiological, solution Compare hypertonic isotonic

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • hypotonicity noun

Etymology

Origin of hypotonic

First recorded in 1890–95; hypo- + tonic

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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.

Some organisms, such as plants, fungi, bacteria, and some protists, have cell walls that surround the plasma membrane and prevent cell lysis in a hypotonic solution.

From Textbooks • Jun. 9, 2022

What tends to happen to cells in a hypotonic environment?

From Textbooks • Jun. 9, 2022

In a hypotonic environment, cells tend to swell due to intake of water.

From Textbooks • Jun. 9, 2022

Sports drinks can be divided into hypotonic, isotonic, and hypertonic.

From Textbooks • Dec. 21, 2021

These particles are drawn along with the water stream which passes from the hypotonic centres or regions toward those which are hypertonic.

From The Mechanism of Life by Leduc, Stéphane