adj. 1. Of, concerning, or characteristic of the devil; satanic. 2. Appropriate to a devil, especially in degree of wickedness or cruelty. [From Middle English deabolik, from Old French diabolique, from Late Latin diabolicus, from Latin diabolus, devil; see DEVIL.] di′a·boli·cal·ly adv. di′a·boli·cal·ness n. |
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