Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
substillus, a, um, adj. [sub-stillo] (ante- and post-class.), slightly dropping, dribbling.
- I. Adj.: lotium, i. e. strangury, Cato, R. R. 156, 6.
- II. Subst.: substil-lum, i, n., a slight dropping, a sprinkling: substillum tempus ante pluviam jam paene uvidum et post pluviam non persiccum, quod jam stillaret, aut nondum desisset, Fest. pp. 306 and 307 Müll.: dehinc substillum et denuo sudum, Tert. Pall. 2.