Lewis & Short

1. cornūtus, a, um, adj. [cornu],

  1. I. horned: animalia, Varr. R. R. 2, 7, 2: aries, Col. 7, 3, 4.
    1. B. Meton. (cf. cornu, I. B.): quadrupedes (i. e. elephanti), Varr. L. L. 7, § 39 Müll.: luna, Amm. 14, 2, 2.
    2. C. Subst.:
      1. 1. cornūti, ōrum, m. (= tauri), bullocks, Att. ap. Non. p. 395, 24 (Trag. Rel. v. 494 Rib.).
      2. 2. cornūtae, ārum, f., a kind of sea-fish. Plin. 32, 11, 53, § 145; Apic. 10, 3, § 454.
  2. II. Trop.: syllogismus, a horned syllogism, a sophistical conclusion, sophism, = ceratina, Hier. Ep. 69, n. 2; cf.: cornuta interrogatio, id. adv. Helvid. 16.