Arnold of Villanova (1235? - 1311) was a Spanish alchemist and physician. He discovered carbon monoxide and pure alcohol. Events Anglo-Norman invasion of Connacht St. ... Events Bolingbroke Castle passes to the House of Lancaster. ... Look up Alchemist in Wiktionary, the free dictionary Alchemist may refer to— a person who practices alchemy. ... A physician is a person who practices medicine. ... Carbon monoxide, chemical formula CO, is a colourless, odourless, flammable and highly toxic gas. ... In general usage, alcohol (from Arabic al-khwl الكحول, or al-ghawl الغول) refers almost always to ethanol, also known as grain alcohol, and often to any beverage that contains ethanol (see alcoholic beverage). ...