Lewis & Short

dēdĭcātīvus, a, um, adj. [dedico] in the later philosoph. lang. = affirmativus, affirmative (opp. abdicativus): propositio, App. Dogm. Plat. 3, p. 31, 23 al.
Adv.: dēdĭcātīvē, affirmatively: concludere, Mart. Cap. 4, § 409.