diabolology|ˌdaɪəbɒˈlɒlədʒɪ| [f.Gr. διάβολος devil + -logy, Gr. -λογία speech. See also prec.] The doctrine of the devil as a branch of science or study; devil-lore. 1875Kinglake Crimea (1877) VI. vi. 67 What, in diabolology, has often been called a snare.