cholinesterase: an enzyme that hydrolyses acetylcholine (into choline and acetic acid)
enzyme: any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
albigensianism: a Christian movement considered to be a medieval descendant of Manichaeism in southern France in the 12th and 13th centuries; characterized by dualism (asserted the coexistence of two mutually opposed principles, one good and one evil); was exterminated for heresy during the Inquisition