Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dēstillātĭo, ōnis, f. [destillo], a dripping down, distilling; in medic. lang., a rheum, catarrh, running, Cels. 1, 2; 4, 2; Plin. 20, 17, 71, § 183; 22, 25, 68, § 139 et saep.: jecoris, an abscess, Amm. 14, 11, 24.