Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. runco, āre, v. a. [runca, runcina], to weed out, root up; to weed, clear of weeds.
2. runco, ōnis, m. [1. runco], a weedinghook, grubbing-hoe, Pall. 1, 43, 3; cf. Isid. Orig. 20, 14, 5.