Lewis Short
(adjective) : rēgŭlāris, e, regula, I. B. 1.
* Of or belonging to a bar: aes, that can be formed into bars; called also aes ductile, Plin. 34, 8, 20, § 94; Isid. 16, 20, 7.
* Containing rules for guidance: libri regulares, quos diaeteticos vocant,Cael. Aur. Tard. 2, 11, 145.— Adv.: rēgŭlārĭter (acc. to regula, II.), according to rule, regularly (late Lat.): dicere,Dig. 15, 3, 3, § 2; Macr. Somn. Scip. 1, 20; Mart. Cap. 9, § 898: praeterita vestigia regulariter recurrere,Aug. Doctr. Chr. 2, 29.
Charlton T. Lewis, Charles Short, A Latin Dictionary