grātŭlātōrĭus, a, um, adj. [gratulor],
congratulatory (post-class.): epistola, Capitol. Max. et Balb. 17: cena, Jul. Val. Rer. Gest. Alex. 3, 34 al.—Adv.: grātŭ-lātōrĭē , in a congratulatory manner : mirari, Aug. Conf. 8, 6.