Lewis & Short

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lĭbrārĭum, v. 2. librarius, II. C.

1. lībrārĭus, a, um, adj. [libra].

  1. I. Of or containing a pound, of a pound weight (post-Aug.): frusta, Col. 12, 53, 4: as, Gell. 20, 1, 31.
  2. II. Subst.
    1. A. lībrārĭus, ii, m., a weight, the sixteenth part of a modius, = sextarius: sextarius aequus aequo cum librario siet, sexdecimque librarii in modio sient, Plebisc. ap. Paul. ex Fest. p. 246 Müll.
    2. B. lībrārĭa, ae, f., she that weighed out the wool to the female slaves, a forewoman, head-spinner, called also lanipendia, Juv. 6, 475 (by others referred to 2. librarius); Inscr. Orell. 4212.

2. lĭbrārĭus, a, um, adj. [3. liber],

  1. I. of or belonging to books: scriba librarius, a copyist, transcriber of books, Varr. R. R. 3, 2, 14; Cic. Agr. 2, 13, 32: libraria taberna, a bookseller’s shop, Cic. Phil. 2, 9, 21: scriptor, a transcriber of books, Hor. A. P. 354: atramentum, ink for writing books, Plin. 27, 7, 28, § 52.
    Hence,
  2. II. Subst.
    1. A. lĭ-brārĭus, i, m.
      1. 1. A transcriber of books, a copyist, scribe, secretary, Cic. Agr. 2, 5, 13: librum ut tuis librariis daret, id. Att. 12, 40, 1: librarii mendum, Liv. 38, 55, 8: legionis, the secretary of the legion, Inscr. ap. Grut. 365, 1; cf. Sen. Contr. 1, 7, 18; Juv. 9, 109.
      2. 2. A bookseller, Sen. Ben. 7, 6, 1; Gell. 5, 4, 2; 18, 4, 1; Sulp. Sev. Dial. 1, 23, 4.
      3. 3. (Sc. doctor.) An elementary teacher, Hier. Ep. 107, 4.
    2. B. lĭbrārĭa, ae, f.
      1. 1. A female scribe: (Parcae) utpote librariae Superum archivumque custodes, Mart. Cap. 1, § 65 (perh. also Juv. 6, 476; cf. sub 1. librarius).
      2. 2. A bookseller’s shop; in libraria, ego et Julius Paulus poëta consederamus, Gell. 5, 4, 1: quispiam in libraria sedens, id. 13, 30, 1.
    3. C. lĭbrārĭum, ii, n., a place to keep books in, a bookcase, bookchest: exhibe librarium illud legum vestrarum, Cic. Mil. 12, 33: libraria omnia exurerent, Amm. 29, 2, 4.

lībro, āvi, ātum, 1, v. a. [libra].

  1. I. To balance, make even, level, to determine a level: aquam, to level water, i. e. to ascertain the fall of water by means of a level, Vitr. 8, 6, 3: collocationem libratam indicare, id 8, 6, 1.
    Pass. impers.: libratur autem dioptris, Vitr. 8, 6, 1.
    1. B. Transf., to make even or level: pavimenta, Cato, R. R. 18, 7.
  2. II. To hold in equilibrium, to poise, balance: terra librata ponderibus, Cic. Tusc. 5, 24, 69: columnarum turbines ita librati perpenderunt, ut puero circumagente tornarentur, Plin. 36, 13, 19, § 91: librati pondera caeli orbe tene medio, Luc. 1, 58.
    1. B. To cause to hang or swing, to keep suspended, keep in its place: vela cadunt primo et dubia librantur ab aura, are waved to and fro, Ov. F. 3, 585: et fluctus supra, vento librante, pependit, Sil. 17, 274: aëris vi suspensam librari medio spatio tellurem, Plin. 2, 5, 4, § 10.
    2. C. To cause to swing, to swing, sway, brandish, set in motion, hurl, dash, cast, launch, fling, throw: summā telum librabat ab aure, Verg. A. 9, 417: ferro praefixum robur, id. ib. 10, 479: caestus, id. ib. 5, 478: tum librat ab aure intorquens jaculum, Sil. 5, 576: dextra libratum fulmen ab aure misit, Ov. M. 2, 311; 5, 624; 7, 787; Luc. 3, 433: librata cum sederit glans, Liv. 38, 29: librare se, to balance or poise one’s self, to fly: cursum in aëre, Ov. Am. 2, 6, 11: saepe lapillos Tollunt; his sese per inania nubila librant, Verg. G. 4, 196: haliaeetos librans ex alto sese, Plin. 10, 3, 3, § 8: corpus in herba, to stretch one’s self out on the grass, Ov. F. 1, 429: incidentis manus libratur artifici temperamento, Plin. 12, 25, 54, § 115: librare iter, to take one’s way, Sen. Oed. 899.
  3. III. Trop.
    1. A. To make of even weight, to balance, make equal (poet.): orbem horis, Col. 10, 42: crimina in antithetis, Pers. 1, 85.
    2. B. To weigh, ponder, consider (poet. and in post-class. prose): librabat metus, Stat. Th. 9, 165: quae omnia meritorum momenta perpendit, librat, examinat, Naz. Pan. ad Const. 7: praescriptiones, Cod. Th. 8, 4, 26.
      Hence, lībrātus, a, um, P. a.
    1. A. Level, horizontal: aquam non esse libratam, sed sphaeroides habere schema, Vitr. 8, 6.
    2. B. Poised, balanced, swung, hurled, launched; forcible, powerful: librata cum sederit (glans), Liv. 38, 29: librato magis et certo ictu, violent, powerful, Tac. H. 2, 22: malleus dextra libratus ab aure, Ov. M. 2, 624: per nubes aquila librata volatu, Sil. 15, 429.
      Comp.: libratior ictus, Liv. 30, 10; cf. id. 42, 65.
      Hence, * adv.: lībrātē, deliberately: aliquid eligere, Serv. Verg. A. 2, 713.