Lewis & Short

internus, a, um, adj. [in; cf. interior, intestinus, intus], inward, internal (postAug.).

  1. I. Adj.
    1. A. Lit.: ignis, Sen. Q. N. 6, 27, 2: arae, Ov. H. 7, 113: maria, inland, Plin. 2, 68, 68, § 173.
    2. B. Trop., domestic, civil, internal: discordiae, Tac. A. 2, 26: certamina, id. ib. 54: internum simul externumque bellum, id. H. 2, 69: mala, Sall. H. Fragm. 4, 61, 13.
  2. II. Subst.: interna, ōrum, n. plur.
    1. A. Interior parts: mundi, Plin. 2, 1, 1, § 4.
    2. B. Internal or domestic affairs: si quando ad interna praeverterent, Tac. A. 4, 32.
    3. C. Entrails, intestines: boum, Veg. Vet. 3, 2.
    4. D. Trop.: veritatis, the very depths of truth, Amm. 15, 5, 23.
      Adv.: interne, inwardly, internally (post-class.), Aus. Ep. 5, 21; id. Clar. Urb. 14.