ace·to·to·lu·i·dide \-_təˈlüəˌdīd\noun alsoac·e·to·tol·u·ide\-ˈtälyəˌwīd\ (-s) Etymology: International Scientific Vocabulary acet- + -toluidide (from toluid- + -ide) or toluide : any of three crystalline isomeric compounds CH3CONHC6H4CH3 made by acetylating the toluidines