Lewis & Short

† pseudŏthyrum, i, n., = ψευδόθυρον.

  1. I. Lit., a backdoor, private entrance, postern-gate: palatii, Amm. 14, 1, 3; Oros. 7, 6 fin.
  2. II. Trop., a secret manner: (nummi) per pseudothyrum revertantur, Cic. Verr. 2, 2, 20, § 50: non janua receptis, sed pseudothyro intromissis voluptatibus, id. Red. in Sen. 6, 14.