a. [ Cf. L. deductivus derivative. ] Of or pertaining to deduction; capable of being deduced from premises; deducible. [ 1913 Webster ]
All knowledge of causes is deductive. Glanvill. [ 1913 Webster ]
Notions and ideas . . . used in a deductive process. Whewell. [ 1913 Webster ]
adv. By deduction; by way of inference; by consequence. Sir T. Browne. [ 1913 Webster ]