Lewis & Short

rĕvŏcātōrĭus, a, um, adj. [revoco], for calling or drawing back, revocatory (postclass.): emplastrum, Theod. Prisc. 2, 32.
Subst.: rĕvŏcātōrĭa, ae, f. (sc. epistula), a letter of recall, Cod. Just. 12, 1, 18.