gly·​co·​gen | \ˈglī-kə-jən \

Definition of glycogen 

: a white amorphous tasteless polysaccharide (C6H10O5)x that is the principal form in which glucose is stored in animal tissues and especially muscle and liver tissue

Examples of glycogen in a Sentence

Recent Examples on the Web

This makes a strategic refueling plan all the more important, ensuring optimal hydration and replenishing glycogen stores. Laura Schwecherl, SELF, "14 Experienced New York City Marathoners Share Their Best Tips for First-Timers," 30 Oct. 2018 In humans, fasting for 12 hours or more drops the levels of glycogen, a form of cellular glucose. Mark Barna, Discover Magazine, "Not So Fast," 24 Sep. 2018 The pancreas produces insulin in order to move that glucose into the tissues of our body, which is then used for energy or, in the case of our liver, is stored as glycogen that's released between meals to keep blood sugar levels stable. Colleen Stinchcombe, Woman's Day, "What's the Difference Between Type 1 and Type 2 Diabetes?," 10 Sep. 2018 In about 45 minutes of active play, many athletes can deplete their reserves of glycogen. Mari A. Schaefer,, "Drexel's Dragon Gel sports snack fuels college teams, Union, Flyers," 23 Apr. 2018 Such brain training might also increase the amount of fuel your brain is able to store, just as exercise leads to an increase in how much glycogen your muscles can store. Alex Hutchinson, Outside Online, "Here’s What We Know About Mental Fatigue," 10 July 2018 And what about unpredictable genetic conditions like Factor V Leiden thrombophilia, a blood clotting disorder, or McArdle disease, in which the body can’t break down glycogen in muscle cells? Carolyn Sue Richards, Smithsonian, "Most Parents Want to Test Their Unborn Kids’ Genes For Disease Risk," 25 May 2018 Backus has glycogen storage disease, which requires him to be fed through a port every three hours in order to keep his blood sugar at safe levels and avoid seizures, or worse. Mike Anthony,, "Mike Anthony: Travelers Championship Sets The Stage For Golf Magic It Deserves," 9 May 2018 So Dardarian and her team began developing a carbohydrate-rich snack to help replenish glycogen stores. Mari A. Schaefer,, "Drexel's Dragon Gel sports snack fuels college teams, Union, Flyers," 23 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glycogen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of glycogen

circa 1864, in the meaning defined above

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Last Updated

13 Nov 2018

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Time Traveler for glycogen

The first known use of glycogen was circa 1864

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More Definitions for glycogen


gly·​co·​gen | \ˈglī-kə-jən \

Kids Definition of glycogen

: a white tasteless starchy substance that is the main form in which glucose is stored in the body


gly·​co·​gen | \ˈglī-kə-jən \

Medical Definition of glycogen 

: a white amorphous tasteless polysaccharide (C6H10O5)x that constitutes the principal form in which glucose is stored in animal tissues, occurs especially in the liver and in muscle and also in fungi and yeasts, and resembles starch in molecular structure and in the formation of only glucose on complete hydrolysis

called also animal starch

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