GLYCOGEN
glycogen, animal starch
(noun) one form in which body fuel is stored; stored primarily in the liver and broken down into glucose when needed by the body
Source: WordNet® 3.1
Etymology
Noun
glycogen (countable and uncountable, plural glycogens)
(carbohydrate) A polysaccharide that is the main form of carbohydrate storage in animals; converted to glucose as needed.
Source: Wiktionary
Gly"co*gen, n. Etym: [Gr. -gen: cf. F. glycogène.] (Physiol. Chem.)
Definition: A white, amorphous, tasteless substance resembling starch,
soluble in water to an opalescent fluid. It is found abundantly in
the liver of most animals, and in small quantity in other organs and
tissues, particularly in the embryo. It is quickly changed into sugar
when boiled with dilute sulphuric or hydrochloric acid, and also by
the action of amylolytic ferments.
Source: Webster’s Unabridged Dictionary 1913 Edition