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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.
glycemic of or pertaining to glucose in the blood.
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.
glycine a simple, nonessential amino acid found in proteins.
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]
glycoprotein a protein that has carbohydrate molecules attached.
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.
GMO abbreviation of "genetically modified organism."
gnarl a knotty bulge on a tree. [2 definitions]
gnarled bent and twisted, as a tree's branches or trunk. [2 definitions]
gnash to grind (the teeth) together. [3 definitions]
gnat any of numerous very small flying insects, some of which bite or sting.
gnaw to bite or chew repeatedly on. [6 definitions]