Lewis & Short

lātrīna, ae (collat. forms lăvātrīna, f., and lātrīnum, i, n., Lucil. and Laber. ap. Non. 212, 10 sq.; cf. Lachm. ad Lucr. 2, p. 393), f. [contr. from lavatrina, Varr. L. L. 5, § 118 Müll.; 9, § 68 ib.].

  1. I. A bath: qui in latrina languet, Lucil. ap. Non. 212, 9.
  2. II. A water-closet, privy, Laber. ap. Non. 212, 10; Plaut. Curc. 4, 4, 24; Suet. Tib. 58; Col. poët. 10, 85.
    Form lavatrina, Varr. L. L. 5, § 118 Müll.
    1. B. A brothel: latrinarum antistes, Tert. Pall. 4.