The traditional, classical or popular (meaning of the people) ballad has been seen as beginning with the wandering minstrels of late medieval Europe. From the end of the 15th century there are printed ballads that suggest a rich tradition of popular music.
Definition of gasohol for English Language Learners. : a mixture of gasoline and ethanol that is used as a fuel for engines.
Sodium hydroxide. Sodium hydroxide (NaOH), also known as lye and caustic soda, is an inorganic compound. It is a white solid and highly caustic metallic base and alkali of sodium which is available in pellets, flakes, granules, and as prepared solutions at different concentrations. Sodium hydroxide forms an approximately 50% (by mass) saturated solution with water.