Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
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.].