The American Heritage® Dictionary of the English Language, 4th Edition
n. A flammable, potentially explosive, colorless liquid, C4H8O2, used as a solvent for fats, greases, and resins and in various products including paints, lacquers, glues, cosmetics, and fumigants.
n. Any of a class of six-membered, saturated heterocycles having four carbon atoms and two oxygen atoms in the ring.
Word Usage
"Method, and other companies that produced green cleaning products were When testing around a hundred "cosmetic, personal care and household cleaning formulas, [the Association] found that nearly 50\% of them contained detectable levels of 1,4-dioxane, which is known to cause cancer in lab animals.""