Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
scūtāle, is, n. [scutum], the thong of a sling for throwing stones, etc. (corresp. with habena), Liv. 38, 29, 6 (also cited ap. Prisc. p. 726 P.); 42, 65, 10.