adjective.
Involving or using deduction in reasoning.
The Century Dictionary and Cyclopedia
Consisting of deduction; of the nature of or based on inference from accepted principles.
Deduced; derived as a conclusion from accepted principles; relating to inference from a principle to the results of that principle in any special case.
the GNU version of the Collaborative International Dictionary of English
adjective.
Of or pertaining to deduction; capable of being deduced from premises; deducible.