Lewis & Short

co-gnātus, a, um, adj. [natus, nascor],

  1. I. sprung from the same stock, related by blood, kindred; and subst.: cognātus, i, m., and cognāta, ae, f., a blood-relation, kinsman (on either the father’s or the mother’s side; a more comprehensive word than agnatus, q. v.; very freq. and class.).
      1. 1. Masc.: cognatus vester, Plaut. Poen. 5, 4, 86: propinqui atque cognati, Cic. Rosc. Am. 34, 96: amici cognatique alicujus, id. Caecin. 5, 15: cognati atque affines, id. post Red. ad Quir. 3, 6; Hor. S. 1, 9, 27 et saep.
        Gen. plur.: cognatūm, Plaut. Am. 2, 2, 209.
        With dat.: is mihi cognatus fuit, Ter. And. 5, 4, 23; id. Ad. 5, 8, 24.
      2. 2. Fem.: amicae et cognatae, Ter. Hec. 4, 2, 16; id. Phorm. 2, 3, 6; 5, 3, 20.
        With dat., Plaut. Poen. prol. 97: negat Phanium esse hanc sibi cognatam, Ter. Phorm. 2, 3, 5.
    1. B. Poet., of objects relating to kindred: rogi, Prop. 3 (4), 7, 10: latus, Ov. M. 9, 412: corpora, id. ib. 2, 663; 13, 615: pectora, id. ib. 6, 498: moenia, id. ib. 15, 451: cineres, Cat. 68, 98: urbes, Verg. A. 3, 502: sanguis, id. ib. 12, 29: acies (i. e. between Cœsar and Pompey), Luc. 1, 4 et saep.
    2. C. Transf.
      1. 1. Of animals: genus, Plin. 10, 3, 4, § 13.
      2. 2. Of plants: arbores, Plin. 16, 10, 16, § 38.
      3. 3. Of other things; so (acc. to Pythagorean notions) of the soul, kindr. with the Deity, Ov. M. 1, 81 (cf. Cic. Sen. 21, 78; id. N. D. 1, 32, 91; Lucr. 2, 991; Diog. Laert. 1, 28 al.).
        Of Thebes: moenia cognata Baccho, Stat. Th. 1, 11.
        Of beans, in allusion to the doctrine of transmigration: faba Pythagorae cognata, Hor. S. 2, 6, 63 al.
  2. II. Trop., kindred, related, connected, like, similar: nihil est tam cognatum mentibus nostris quam numeri ac voces, Cic. de Or. 3, 51, 197: (deus mundo) formam et maxime sibi cognatam et decoram dedit, id. Univ. 6 init.: gypsum calci, Plin. 36, 24, 59, § 182: vocabula, Hor. S. 2, 3, 280; cf. Quint. 1, 5, 49: qui (princeps) quod umquam claritudine eminuit, id veluti cognatum censet tuendum, Vell. 2, 130, 1.