Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sectīvus, a, um, adj. [seco], that may be cut: porrum, cut-leek, chives, Col. 11, 3, 30; 12, 8, 3 (also cited in Pall. Febr. 24, 11); Plin. 19, 6, 33, § 168; cf. sectilis, II.