glycogen

gly·co·gen

noun \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

First Known Use of GLYCOGEN

circa 1864

gly·co·gen

noun \ˈglī-kə-jən\   (Medical Dictionary)

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

glycogen

noun    (Concise Encyclopedia)

Principal storage carbohydrate of animals, occurring primarily in the liver and resting muscles. It is also found in various bacteria, fungi, and yeasts. Glycogen is a branched polysaccharide, a long chain of glucose units, into which it is broken down when energy is needed.