Lewis & Short

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dū̆plex, ĭcis (abl. commonly duplici; duplice, Hor. S. 2, 2, 122), adj. [duo-plico], twofold, double.

  1. I. Lit.: et duplices hominum facies et corpora bina, Lucr. 4, 452; cf. aër (with geminus), id. 4, 274: cursus (with duae viae), Cic. Tusc. 1, 30: pars (opp. simplex), Quint. 8, 5, 4; cf. id. 4, 4, 5: modus (opp. par and sesquiplex), Cic. Or. 57, 193 et saep.: duplici de semine, Lucr. 4, 1229: quem locum duplici altissimo muro munierant, Caes. B. G. 2, 29, 3: fossa duodenūm pedum, id. ib. 7, 36 fin.: vallum, id. B. C. 3, 63, 3: rates, id. ib. 1, 25, 6: tabellae, consisting of two leaves, Suet. Aug. 27: dorsum, consisting of two boards, Verg. G. 1, 172: acies, Caes. B. G. 3, 24, 1; id. B. C. 1, 83, 1; 3, 67, 3 al.; cf. proelium, Suet. Aug. 13: seditio, id. Tib. 25: triumphus, id. Dom. 6: cura, id. Tib. 8 et saep.
    Prov.: duplex fit bonitas, simul accessit celeritas, who gives promptly gives twice, Pub. Syr. 141 (Rib.).
    1. B. Transf.
      1. 1. Of things made double by being divided into two, cloven, bipartite, double: ne duplices habeatis linguas, ne ego bilingues vos necem, Plaut. Truc. 4, 3, 7; cf. id. As. 3, 3, 105: ficus, Hor. S. 2, 2, 122; Plin. 20, 6, 23, § 52; Veg. Vet. 2, 10, 6 (1, 38, p. 265 Bip; cf. id. 1, 56, p. 281 Bip.): folia palmae, Plin. 16, 24, 38, § 90: lex, Quint. 7, 7, 10.
      2. 2. Poet., like the Gr. διπλοῦς, of things in pairs, for ambo or uterque, both: oculi, Lucr. 6, 1145: palmae, Verg. A. 1, 93; cf. Ov. Am. 3, 327.
      3. 3. Opp. to single, like the Gr. διπλοῦς and our double, for thick, strong, stout: clavi, Cato R. R. 20: amiculum, Nep. Dat. 3; cf. pannus, Hor. Ep. 1, 17, 25: fenus, Prop. 3 (4), 1, 22 (for which: magnum fenus, Tib. 2, 6, 22).
      4. 4. With quam in post-Aug. prose, for alterum tantum, twice as much as, Col. 1, 8, 8: duplex quam ceteris pretium, Plin. 19, 1, 2, § 9; Quint. 2, 3, 3.
  2. II. Trop.
      1. 1. Of words, of a double sense, ambiguous: verba dubia et quasi duplicia, Quint. 9, 2, 69.
      2. 2. In poets, like the Gr. διπλοῦς, of character, qs. double-tongued, double-faced, i. e. false, deceitful: Ulixes, Hor. C. 1, 6, 7: Amathusia, Cat. 68, 51; so, animo, Vulg. Jacob. 1, 8; 4, 8.
        Adv.: dū̆-plĭcĭter, doubly, on two accounts, Lucr. 6, 510; Cic. Ac. 2, 32, 104; id. Fam. 9, 20: res conscriptae, ambiguously, Arn. 5, p. 182; Vulg. Sirach, 23, 13.

dū̆plĭcĭter, adv., doubly, on two accounts, v. duplex fin.