Pronunciation: (i-rith'ri-tôl", -tol"), [key]
—n. Chem., Pharm.
a white, crystalline, water-soluble, sweet-tasting, tetrahydroxyl compound, C4H10O4, related to the carbohydrates, obtained from certain lichens and used for coronary vasodilation and in the treatment of hypertension.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.