Lewis & Short

brĕvĭārĭus, a, um, adj. [brevio], abridged: rationes, Dig. 33, 8, 26.
More freq. subst.: brĕvĭārĭum, ii, n., a summary, abridgment, abstract, epitome (postAug.; cf. summarium): haec quae nunc vulgo breviarium dicitur, olim, cum Latine loqueremur, summarium vocabatur, Sen. Ep. 39, 1: omnis culturae, Plin. 18, 26, 62, § 230: rationum, Suet. Galb. 12: imperii, statistical view, statistics, id. Aug. 101 (cf. id. ib. 28: rationarium imperii; and id. Calig. 16: rationes imperii): rerum omnium Romanarum, id. Gram. 10: officiorum omnium breviaria, official reports, id. Vesp. 21; Tac. A. 1, 11; Eutr. tit.