Glycerol A trihydroxy sugar alcohol that is an intermediate in carbohydrate and lipid metabolism. It is used as a solvent, emollient, pharmaceutical agent, and sweetening agent.
Glycerin - definition from Biology-Online.org
[Synonym: glycerol. a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils.
MediLexicon glycerol - Medical Dictionary Definition for Term 'glycerol'
[1. A sweet viscous fluid obtained by the saponification of fats and fixed oils; used as a solvent, as a skin emollient, by injection or in the form of suppository for constipation, and as a vehicle and sweetening agent.