ap·o·dic·tic (āp'ə-dĭk'tĭk) adj. Necessarily or demonstrably true; incontrovertible.
[Latin apodīcticus, from Greek apodeiktikos, from apodeiktos, demonstrable, from apodeiknunai, to demonstrate : apo-, apo- + deiknunai, to show; see deik- in Indo-European roots.] ap'o·dic'ti·cal·ly adv.