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gluon in physics theory, a massless particle or type of energy that binds quarks together and thus forms protons, neutrons, and the like.
glut to supply (a market) with much more of a particular article than there is demand for. [5 definitions]
glutamate a salt or ester of glutamic acid.
glutamic acid an amino acid used esp. as a salt flavoring on meats and other foods.
gluten a tough, elastic protein substance that occurs in cereal grains and flours, esp. wheat and corn, and makes dough sticky.
gluteus any of the three major muscles in the buttocks.
glutinous sticky, as glue.
glutton someone who eats an excessive amount, or one who both eats and drinks excessively. [2 definitions]
gluttonous inclined to eat excessively; voracious.
gluttony the habit or an instance of excessive eating and drinking.
glyceride an ester of glycerol that is the main component of fatty tissue.
glycerin a sweet colorless or yellowish syrupy alcohol; glycerol.
glycerol a sweet colorless or yellowish syrupy alcohol derived from fats or oils, used as a sweetener, solvent, and antifreeze, and in the making of soap, cosmetics, medicines, and explosives.
glyco- sugar; sweet.
glycogen a white substance, similar to starch, that is the principal storage material for carbohydrates in animals; animal starch.
glycol a chemical compound used as a solvent and as an antifreeze in automobiles; ethylene glycol. [2 definitions]
glycoside any of a group of sugar compounds that yield a sugar and one or more other substances on hydrolysis.
GM abbreviation of "genetically modified."
G-man an agent of the Federal Bureau of Investigation; government man.
gnarl a knotty bulge on a tree. [2 definitions]
gnarled bent and twisted, as a tree's branches or trunk. [2 definitions]