Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sălillum, i, n. dim. [for salinulum, from salinum], a little salt-cellar, Cat. 23, 19.
In comic lang.: salillum animae, perh. little measure, brief span of life, Plaut. Trin. 2, 4, 91.