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|lshtext=<b>cardo</b>: ĭnis, m. cf. [[κράδη]], a [[swing]]; [[κραδαίνω]], to [[swing]], [[wave]]; Sanscr. kurd, a [[spring]], a [[leap]]; old Germ. hrad, [[lively]], and Germ. reit in bereit, [[ready]] (f., Gracch. ap. Prisc. p. 683 P.; [[Graius]] ap. Non. p. 202, 20; cf. [[infra]] in Vitr.),<br /><b>I</b> the [[pivot]] and [[socket]], [[upon]] [[which]] a [[door]] [[was]] made to [[swing]] at the [[lintel]] and the [[threshold]], the [[hinge]] of a [[door]] or [[gate]], Enn. Trag. 119 Vahl.: [[paene]] ecfregisti foribus cardines, Plaut. Am. 4, 2, 6; id. As. 2, 3, 8: [[postis]] a cardine vellit Aeratos, Verg. A. 2, 480: [[cardo]] stridebat, id. ib. 1, 449; cf. id. Cir. 222: num muttit [[cardo]]? Plaut. Curc. 1, 1, 94: immoti, Plin. 16, 43, 84, § 230: [[singuli]], id. 36, 15, 24, § 117: facili patuerunt cardine valvae, Juv. 4, 63: versato cardine [[Thisbe]] Egreditur, [[opening]] the [[door]], Ov. M. 4, 93; cf. Verg. A. 3, 448: nec strepitum [[verso]] Saturnia cardine fecit, Ov. M. 14, 782 al.—<br />&nbsp;&nbsp;&nbsp;<b>B</b> [[Meton]].<br />&nbsp;&nbsp;&nbsp;<b>1</b>&nbsp;&nbsp;&nbsp; Cardines, in mechanics, beams [[that]] were fitted [[together]]; and [[specifically]], [[cardo]] [[masculus]], a tenon, Vitr. 9, 6, and [[cardo]] [[femina]], a [[socket]], a mortise, id. 9, 6: [[cardo]] [[securiclatus]], axeshaped tenon, a dovetail, id. 10, 15, 3.— Hence,<br />&nbsp;&nbsp;&nbsp;<b>b</b> In garlands, the [[place]] [[where]] the [[two]] ends [[meet]], Plin. 21, 4, 10, § 18.—<br />&nbsp;&nbsp;&nbsp;<b>2</b>&nbsp;&nbsp;&nbsp; In astron., the [[point]] [[about]] [[which]] [[something]] turns, a [[pole]]. So of the North [[pole]]: caeli, Varr. R. R. 1, 2, 4: mundi, Plin. 4, 12, 26, § 89; cf.: extremusque [[adeo]] duplici de cardine [[vertex]] Dicitur esse [[polus]], Cic. poët. N. D. 2, 41, 105; Ov. P. 2, 10, 45; Stat. Th. 1, 349: [[cardo]] [[glacialis]] ursae, Sen. Herc. Fur. 1139: Arctoae [[cardo]] portae, Stat. Th. 7, 35; [[hence]] anal. to this, [[with]] the agrimensores, the [[line]] limiting the [[field]], [[drawn]] [[through]] from [[north]] to [[south]], Plin. 18, 33, 76, § 326; 17, 22, 35, § 169; cf. Fest. s. v. [[decimanus]], p. 71 Müll., and [[accordingly]] the [[mountain]] [[Taurus]] is called [[cardo]], i. e. [[line]] or [[limit]], Liv. 37, 54, 23; cf. id. 40, 18, 8; 41, 1, 3.—Of the [[four]] [[cardinal]] points of the [[world]], Quint. 12, 10, 67; so, [[Hesperius]] Eous, Luc. 5, 71; Stat. Th. 1, 157: [[occiduus]], Luc. 4, 672: [[medius]], id. 4, 673.— Of the [[earth]] as the [[centre]] of the [[universe]], acc. to the [[belief]] of the ancients, Plin. 2, 64, 64, § 160; 2, 9, 6, § 44.—Of the intersection of inclined surfaces: reperiuntur (aquae) ... quodam convexitatis cardine aut montium radicibus, Plin. 31, 3, 26, § 43.—Of the [[summer]] [[solstice]]: anni, Plin. 18, 28, 68, § 264; and so of the epochs of the [[different]] seasons: temporum, id. 18, 25, 58, § 218; 18, 25, 59, § 220.—Hence, of the [[time]] of [[life]]: [[extremus]], old [[age]], Luc. 7, 381.—<br /><b>II</b> Trop., [[that]] on [[which]] [[every]] [[thing]] [[else]] turns or depends, the [[chief]] [[point]] or [[circumstance]] (so not [[before]] the Aug. per.): [[haud]] tanto cessabit cardine rerum, at [[such]] a [[turn]] of affairs, so [[great]] a [[crisis]], in so [[critical]] a [[moment]], [[decisive]], Verg. A. 1, 672 (hoc est in [[articulo]], Serv.; cf. Isid. Orig. 15, 7, 6; Gr. ἀκμ): fatorum in cardine summo, Stat. Th. 10, 853: litium. Quint. 12, 8, 2: causae, id. 5, 12, 3: satellitem in quo totius dominationis [[summa]] [[quasi]] quodam cardine continetur, Val. Max. 3, 3, ext. 5: unum eligamus in quo est summum ac principale, in quo totius sapientiae [[cardo]] versatur, Lact. 3, 7, 6.
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