Lewis & Short

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2. calx, calcis, f. (m., Varr. ap. Non. p. 199, 24, and Cato, R. R. 18, 7; Plaut. Poen. 4, 2, 86; dub. Cic. Tusc. 1, 8, 15; and id. Rep. Fragm. ap. Sen. Ep. 108 fin.; cf. Rudd. I. p. 37, n. 3; later collat. form calcis, is, f., Ven. Fort. Carm. 11, 11, 10) [χάλιξ].

  1. I. Liv.
    1. A. A small stone used in gaming, a counter (less freq. than the dim. calculus, q. v.), Plaut. Poen. 4, 2, 86; Lucil. ap. Prisc. p. 687 P.; cf. Paul. ex Fest. p. 46 Müll.
    2. B. Limestone, lime, whether slaked or not, Lucr. 6, 1067; Cic. Mil. 27, 74: viva, unslaked, quicklime, Vitr. 8, 7: coquere, to burn lime, Cato, R. R. 16; Vitr. 2, 5, 1: exstincta, slaked, id. l. l.: macerata, id. 7, 2; Plin. 36, 23, 55, § 177: harenatus, mixed with sand, mortar, Cato, R. R. 18, 7: materies ex calce et harenā mixta, Vitr. 7, 3.
      Since the goal or limit in the race-ground was designated by lime (as later by chalk, v. creta), calx signifies,
  2. II. Trop., the goal, end, or limit in the race-course (anciently marked with lime or chalk; opp. carceres, the starting-point; mostly ante-Aug.; esp. freq. in Cic.): supremae calcis spatium, Lucr. 6, 92 Lachm.; Sen. Ep. 108, 32; Varr. ap. Non. p. 199, 24: ad calcem pervenire, Cic. Lael. 27, 101; so, ad carceres a calce revocari, i. e. to turn back from the end to the beginning, id. Sen. 23, 83: nunc video calcem, ad quam (al. quem) cum sit decursum, id. Tusc. 1, 8, 15: ab ipsā (al. ipso) calce revocati, id. Rep. Fragm. ap. Sen. l.l.; Quint. 8, 5, 30 dub.; v. Spald. N. cr.
        1. b. Prov., of speech: extra calcem decurrere, to digress from a theme, Amm. 21, 1, 14.
    1. B. In gen., the end, conclusion of a page, book, or writing (mostly post-class.): si tamen in clausulā et calce pronuntietur sententia, Quint. 8, 5, 30: in calce epistulae, Hier. Ep. 9; 26 fin.; 84 init.: in calce libri, id. Vit. St. Hil. fin.