lībra (noun F) : cf. λίτρα; root cli-, clino
* The Roman pound, of twelve ounces: as erat libra pondus,Varr. L. L. 5, § 169 Müll.: coronam auream libram pondo ex publica pecunia in Capitolio Iovi donum posuit,Liv. 4, 20: mulli binas libras ponderis raro exsuperant,Plin. 9, 17, 30, § 64: expende Hannibalem, quot libras in duce summo invenies?Juv. 10, 147: neque argenti in convivio plus pondo quam libras centum inlaturos,Gell. 2, 24, 2: dipondii pondo duas erant libras,Gai. Inst. 1, 122.
* Transf.
* A measure for liquids: frumenti denos modios et totidem olei libras,Suet. Caes. 38.
* A balance, pair of scales: cum in alteram librae lancem animi bona imponebat, in alteram corporis, etc.,Cic. Tusc. 5, 17, 51; cf. id. Fin. 5, 30, 91.
* A water-poise, plummet-level, level, line: sin autem locus ... pari libra cum aequore maris est,Col. 8, 17, 4: libratur autem dioptris aut libris aquariis aut chorobate, Vitr. 8, 6, 1.—Hence, ad libram: alteram navem pluribus aggressus navibus in quibus ad libram fecerat turres, of equal height or of equal weight, Caes. B. C. 3, 40, 1.
* Counterpoise, balance: contra flatus quoque pervicax libra Bononiensibus calamis,Plin. 16, 36, 65, § 161: aes et libra, v. aes.
* The constellation Libra, The Balance, Verg. G. 1, 208; Ov. F. 4, 386; Plin. 18, 25, 59, § 221: felix aequato genitus sub pondere Librae,Manil. 4, 545.
* Trop., a balance (poet.), Pers. 4, 10: animi cunctantis libra,Claud. Laud. Stil. 1, 75.

s. TLL