Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
scrŏbĭcŭlus, i, m. [scrobis], a little ditch or trench, Varr. ap. Non. 225, 9; Col. 4, 15, 3; 5, 6, 8; id. Arb. 30, 1; Plin. 21, 5, 13, § 26.