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{{Lewis
|lshtext=<b>rēgŭla</b>: ae, f. [[rego]],<br /><b>I</b> a [[straight]] [[piece]] of [[wood]], [[ruler]], [[rule]] ([[class]].; cf.: [[norma]], [[libella]]).<br /><b>I</b> Lit.: [[atque]] si id crederemus, non egeremus perpendiculis, non normis, non regulis, Cic. Fragm. ap. Non. 163, 2; cf. ([[with]] [[linea]]): [[perpendiculum]], and [[norma]], Vitr. 7, 3: materiam ad regulam et libellam exigere, Plin. 36, 25, 63, § 188; Col. 3, 13, 11 sq.: hoc cum regulā exploraveris aequale, Pall. 1, 9, 2.—<br />&nbsp;&nbsp;&nbsp;<b>B</b> Transf.<br />&nbsp;&nbsp;&nbsp;<b>1</b>&nbsp;&nbsp;&nbsp; A [[straight]] [[staff]]; in gen., a [[stick]], [[lath]], [[bar]] (of [[wood]] or [[iron]]): quadratas regulas, [[quattuor]] patentes digitos, defigunt, Caes. B. C. 2, 10; Front. Strat. 3, 13, 6; Col. 6, 19, 3; 6, 26, 2; 12, 50, 10; Plin. 15, 1, 2, § 5; Cels. 8, 10; Vitr. 5, 10; Stat. Th. 6, 594: [[aurea]], an [[ingot]] of [[gold]], Vulg. Josue, 7, 21.—<br />&nbsp;&nbsp;&nbsp;<b>2</b>&nbsp;&nbsp;&nbsp; A measuringrod: in regulā, in pondere, Vulg. Lev. 19, 35.—<br />&nbsp;&nbsp;&nbsp;<b>3</b>&nbsp;&nbsp;&nbsp; In mechanics.<br />&nbsp;&nbsp;&nbsp;<b>a</b> Plur., the [[two]] cheeks on [[each]] [[side]] of the [[channel]] in [[which]] the [[dart]] of the catapult [[lay]]; also called bucculae, Vitr. 10, 12.—<br />&nbsp;&nbsp;&nbsp;<b>b</b> The [[shank]] of a [[triglyph]], Vitr. 4, 3.—<br />&nbsp;&nbsp;&nbsp;<b>c</b> The disks of an oilpress: [[quod]] si regulis [[olea]] prematur, et [[praelum]] et suculam et regulas dominum parare oportere, Dig. 19, 2, 19, § 2.—<br /><b>II</b> Trop., a [[rule]], [[pattern]], [[model]], [[example]] (cf.: [[formula]], [[praescriptio]]): fontem omnium bonorum in corpore esse: hanc normam, hanc regulam, hanc praescriptionem esse naturae, Cic. Ac. 2, 46, 140: [[regula]], ad [[quam]] eorum dirigantur orationes, qui, etc., id. Opt. Gen. 7 fin.; id. Fin. 1, 19, 63: [[regula]], quā vera et falsa judicarentur, id. Brut. 41, 152: nos studia nostra nostrae naturae regulā metiamur, id. Off. 1, 31, 110: (lex est) juris [[atque]] injuriae [[regula]], id. Leg. 1, 6, 19: [[regula]] totius philosophiae, id. Ac. 2, 9, 29; cf. id. N. D. 1, 16, 43: pravissima consuetudinis [[regula]], id. Brut. 74, 258: mediocritatis [[regula]], id. Off. 2, 17, 59: omnium una [[regula]] est, id. ib. 3, 31, 81: [[emendate]] loquendi [[regula]], Quint. 1, 5, 1; so, loquendi, id. 1, 7, 1: sermonis, id. 1, 6, 44: [[morum]], Mart. 11, 2, 3 et saep.: ad legem ac regulam compositum esse, Quint. 12, 10, 50; cf.: locuti sunt ad hanc regulam, id. 9, 4, 4: [[habeo]] regulam, ut talia visa vera judicem, Cic. Ac. 2, 18, 58: assit Regula, peccatis quae poenas irroget aequas, Hor. S. 1, 3, 118: secundam regulam nostram, Vulg. 2 Cor. 10, 15; cf. id. ib. v. 13, 16; id. Phil. 3, 16.—In plur. ([[only]] [[late]] Lat.), Gai. Inst. 3, § 142; Cod. Just. 1, 17, 2, § 10; Arn. 1, n. 59: regulae credendi, Aug. Doctr. Chr. 4, 9 init.>
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{{Gaffiot
|gf=(1) <b>rēgŭla</b>,¹¹ æ, f. ([[rego]]),<br /><b>1</b> règle servant à mettre droit, à mettre d’équerre : Cic. Ac. fr. 8 ; Plin. 36, 188 || [fig.] règle, étalon [servant à juger, à corriger] : pravissima consuetudinis [[regula]] Cic. Br. 258, la règle (si tordue) si défectueuse de l’usage ; ad regulam [[aliquid]] dirigere Cic. Opt. 23, conformer qqch. à une règle, à un étalon ; habere regulam, [[qua]] vera et falsa judicentur Cic. Br. 152, posséder une règle qui permette de déterminer ce qui [[est]] vrai, ce qui [[est]] [[faux]] ; [[lex]] [[est]] juris [[atque]] injuriæ [[regula]] Cic. Leg. 1, 19, la loi [[est]] la règle du [[juste]] et de l’[[injuste]] || pl., [[Gaius]] Inst. 3, 142 ; Cod. Just. 1, 17, 2, 10 ; etc.<br /><b>2</b> bâton droit, barre, latte : Cæs. C. 2, 10, 4 || tige de piston dans une pompe : Vitr. Arch. 10, 7, 3 || montant du triglyphe : Vitr. Arch. 4, 3, 4 || regulæ Dig. 19, 2, 19, 2, disques pour l’extraction de l’huile.<br />(2) <b>rēgŭla</b>, æ, f., = [[basilisca]] [plante] : Ps. Apul. Herb. 128.
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